* Viper's damage over time and lack of disables makes him easy to Sunder.
* Viper's physical damage is mitigated by Terrorblade's high armor.
* Terrorblade under Metamorphosis can quickly kill Viper with heavy physical damage.
Additional:
* Almost all of Viper's damage revolves exclusively around single-target damage-over-time effects. Furthermore, without any hard disables, Terrorblade can almost always get a Sunder off.
* Viper has low mobility and Corrosive Skin doesn't protect against physical damage, which means that Terrorblade under Metamorphosis can quickly kill Viper.
* Reflection will cause Abaddon to be afflicted by his own Curse of Avernus, silencing and slowing him. The reflection is also hard to avoid, as it cannot be killed, only dispelled.
* Heroes who can negate effects of Sunder: Faceless Void's
Time Walk,
Weaver's
Time Lapse,
Broodmother's
Insatiable Hunger,
Abaddon's
Borrowed Time and
Troll Warlord's
Battle Trance can nullify Sunder.
* Although Viper Strike cannot be dispelled by Doppelganger, Viper's lack of mobility and AoE damage makes him an easy target for Phantom Lancer.
* Viper's various slows do not work against Phantom Rush.
* Although Phantom Lancer should be wary due to Nethertoxin applying Break.
Additional:
* Phantom Lancer can overwhelm Viper with spawned illusions from Spirit Lance and
Doppelganger.
* Viper's various slows do not work against Phantom Rush. Additionally, it is almost impossible to keep Lancer inside
Nethertoxin's radius in order to disable the passive.
* Viper is kind of a mixed package. Tinker is very good against him. but stands a better chance against him then most heroes.
* Viper has a high innate magic resistance, but relies on his primary attacks to really deal damage. making Laser an effective way to save allies from him, and deal damage. Keep in mind that his Corrosive Skin will prevent Tinker from blinking.
* Viper's Viper Strike and
Poison Attack will also have a hard time damaging allies through Tinker's constant casting of
Defense Matrix.
* Viper has no solutions to cancel Rearm nor any of Tinker's escape attempts with
Boots of Travel
* However, if Viper gets a jump on Tinker first. Tinker will unlikely survive versus Viper.
* Viper is an agility hero, and his item build mostly includes agility items, so Natural Order can be devastating, removing all armor and greatly decreasing the effectiveness of Corrosive Skin, weakening Viper's magic resistance. Additionally, Echo Stomp and Earth Splitter deal both magical and physical damage, and can help bringing Viper down fast.
* Aghanim's Scepter may be necessary to take Viper down due to
Nethertoxin's break.
* Viper's lack of escape and durability means he can be ran over in a laning stage by Spawn Spiderlings.
* Broodmother can bring Viper down quickly with Insatiable Hunger activated.
* Astral Imprisonment wastes Borrowed Time's duration.
* Outworld Destroyer's Sanity's Eclipse can kill Abaddon before Borrowed Time triggers due to the lack of intelligence for Abaddon.
* Dispel Magic can remove Abaddon's Aphotic Shield or
Curse of Avernus on an allied hero.
* Cyclone's lengthy duration wastes much of Borrowed Time's duration.
Additional:
* {U:Storm} can use Cyclone on Abaddon when he activates Borrowed Time, wasting its duration.
* Drunken Brawler and
Thunder Clap hinder Abaddon from applying Curse of Avernus' silence on him.
* Shukuchi ignores slows and allows Weaver to escape Viper's onslaught.
* Time Lapse dispels
Poison Attack and
Corrosive Skin and undoes poison damage.
* Weaver's high burst damage allows him to kill Viper before being killed.
* Voodoo Restoration heals to counter damage over time of Viper abilities.
* Viper has no way to cancel Death Ward, even through Rod of Atos.
* Pugna's Decrepify allows him to save allies from being ganked by Viper, since Viper mostly relies on direct attacks in order to deal damage.
* Nether Ward can discourage Viper from spamming his abilities.
* Viper's damage over time is not enough to kill Pugna as he will have more than enough time to save himself (or his allies) with Life Drain and Viper has no solutions to cancel it.
* Pugna has no passive abilities, which renders Nethertoxin nearly useless.
* Rage ignores all of Viper's magical damage, although
Viper Strike can pierce spell immunity and slows him down.
* Feast and
Open Wounds from
Aghanim's Shard can be combined to heal through Viper's physical damage.
* Aghanim's Scepter upgraded
Infest can be used to disarm Viper, preventing him from using
Poison Attack on Lifestealer's allies.
* Shadow Demon with an Aghanim's Scepter will use
Demonic Purge to disable Curse of Avernus and the passive component of Borrowed Time. If this is combined with a silence, Borrowed Time will not trigger at all.
* Even without Aghanim's Scepter, he can still waste Borrowed Time with
Disruption. Curse of Avernus fully works on illusions, turning the passive ability against him.
* Ball Lightning allows Storm Spirit to escape through
Viper Strike, wasting Viper's mana.
* It's also very easy to wait out the duration of Nethertoxin's break.
* Abaddon can be killed without triggering his ultimate Borrowed Time due to the break applied by
Sharpshooter.
* Viper has no disable, which means he has no way of preventing Morphling from escaping from any of his abilities or keep him inside Nethertoxin.
* Viper is almost exclusively damage over time, which is weak against Morphling due to Attribute Shift (Strength Gain). Additionally, Morphling has no passive abilities, reducing
Nethertoxin's effectiveness against him even further.
* Morphling can turn into Viper himself, allowing him to use any of Viper's abilities against him (excluding Viper Strike). This is particularly bad due to the fact that Viper is already a very slow hero, making
Poison Attack and
Corrosive Skin's slows especially difficult to deal with.
* If Rubick can use Spell Steal to take
Nethertoxin, he will be able to disable
Corrosive Skin, reducing much of Viper's durability.
* He can also steal Viper Strike, which can be used to hinder a hero on your team (or multiple heroes, if Rubick has
Aghanim's Scepter).
* Heroes who do not have nor rely on passive abilities make Nethertoxin much less effective: Clinkz,
Pugna,
Nature's Prophet,
Dark Seer,
Lycan,
Tusk
* Heroes that have long silences, such as Night Stalker and
Silencer, will prevent Abaddon from saving his allies effectively and disable the active component of Borrowed Time.
* Heroes who do not have nor rely on passive abilities make Nethertoxin much less effective: Clinkz,
Pugna,
Nature's Prophet,
Dark Seer,
Lycan,
Tusk
* Ranged heroes will have a hard time hitting enemies inside Magnetic Field: Silencer,
Viper.
* Heroes who do not have nor rely on passive abilities make Nethertoxin much less effective: Clinkz,
Pugna,
Nature's Prophet,
Dark Seer,
Lycan,
Tusk
Additional:
* Clinkz does not have any passive abilities at all, making Nethertoxin nearly useless.
* Viper's Corrosive Skin provides no protection against Clinkz's physical damage output.
* Heroes who do not have nor rely on passive abilities make Nethertoxin much less effective: Clinkz,
Pugna,
Nature's Prophet,
Dark Seer,
Lycan,
Tusk
* Viper cannot interrupt heroes with powerful channeling abilities: Bane,
Enigma,
Shadow Shaman,
Warlock
* Heroes who do not have nor rely on passive abilities make Nethertoxin much less effective: Clinkz,
Pugna,
Nature's Prophet,
Dark Seer,
Lycan,
Tusk
Additional:
* Viper Strike can be countered through Snowball, wasting Viper's mana through his ultimate.
* Nethertoxin is useless against Tusk as he has no passive abilities at all. And to make things worse,
Nethertoxin cannot disable
Walrus PUNCH! because it's an auto-cast ability.
* Heroes that can drain mana negatively affect Viper's ability to use Poison Attack, Nethertoxin and Viper Strike: Lion,
Anti-Mage
* Mana Break drains Abaddon's mana, preventing him from using Aphotic Shield to zone out enemies in lane.
* Counterspell decreases the amount of damage received from Aphotic Shield and
Mist Coil.
* Viper's skill set makes him an effective early game ganker against Anti-Mage before he is sufficiently farmed.
* Viper's Corrosive Skin and low mana pool causes him to take little damage from Mana Void.
* Nethertoxin disables Mana Break and Counterspell, weakening both his offense and defense.
* Heroes with extremely slow movement speed will cripple against Solar Bind: Medusa,
Viper
* Viper's Nethertoxin cannot disable
Reincarnation, which could put him in disadvantage against Wraith King if his whole team is with him.
* In addition, Viper doesn't like buying Diffusal Blade, which is the only item that can help him against Wraith King.
* Wraith King's high burst damage allows him to kill Viper before being killed.
* Melee heroes with low mobility can be kited and killed by Viper: Treant Protector,
Kunkka,
Alchemist,
Troll Warlord,
Wraith King,
Tiny,
Sven.
* Even though Luna has a hard time laning against Viper due to Nethertoxin being able to disable
Moon Glaives and
Lunar Blessing, Luna can take out Viper once she builds either
Black King Bar or
Silver Edge which will allow her to attack Viper freely.
* Eclipse can often finish off Viper from early-to-mid stages of the game before he can retaliate as
Corrosive Skin gives little magic resistance to him early on.
* Manta Style is an item that Luna commonly buys in most of the games, which lets her disjoint
Viper Strike. Additionally, illusions from Manta Style can make Viper waste time attacking them.
Additional:
* Even though Luna has a hard time laning against Viper due to Nethertoxin being able to disable
Moon Glaives and
Lunar Blessing, Luna can take out Viper once she builds either
Black King Bar or
Silver Edge which will allow her to attack Viper freely.
* Eclipse can often finish off Viper from early-to-mid stages of the game before he can retaliate as
Corrosive Skin gives little magic resistance to him early on.
* Manta Style is an item that Luna commonly buys in most of the games, which lets her disjoint
Viper Strike. Additionally, illusions from Manta Style can make Viper waste time attacking them.
* Every hero that can withstand or prevent Eclipse at level 7: Juggernaut,
Riki,
Clockwerk,
Drow Ranger,
Abaddon,
Faceless Void,
Weaver,
Outworld Destroyer.
* Windrun evades
Poison Attack and counteracts the slow.
* Viper's low mobility makes him an easy Shackleshot target.
* Focus Fire grants Windranger significant physical damage output to quickly wear Viper down.
* Powershot is a strong harassment and zoning tool against Viper in lane.
* Since Windranger is bad against magical damage, heroes with continuous magical damage or magical nukes can blast her: Zeus,
Tinker,
Leshrac,
Viper,
Skywrath Mage,
Lion,
Lina,
Venomancer.
* Corrosive Skin will protect Viper from Techies' magical damage.
* Even though Reactive Tazer will disarm Viper if he attacks Techies with Poison Attack, he does lots of damage with his other abilities that can still kill Techies.
* Aphotic Shield makes it less likely for allies to be killed by mines.
* Because they explode in very short intervals, a stack of Remote Mines will always trigger Borrowed Time, making them impossible to kill Abaddon unless his resistances are lowered enough or Abaddon is affected by Break.
* Abaddon can easily dispel the long-lasting root of Stasis Trap on himself and on an ally, while at the same also providing protection against the other mines' damage.
Additional:
* Borrowed Time's automatic activation will help Abaddon survive a field of Proximity Mines or a Blast Off combo. However, the damage from a single mine can kill him if his HP is low enough.
* Aphotic Shield's can easily break Techies' Etheral Blade combo.
* Corrosive Skin minimizes the damage Viper takes from all of Disruptor's skills.
* Aphotic Shield dispels Thunder Strike.
* Mist Coil can be used to heal an ally trapped by Static Storm-Kinetic Field combo.
* Borrowed Time makes Abaddon nearly impossible to gank.
* Corrosive Skin means Viper can often outlast Venomancer in a battle of attrition.
* Venomancer has no mobility without items, which makes him vulnerable to constant slows.
* Borrowed Time &
Aphotic Shield can dispel Venomous Gale and Poison Sting.
* Nethertoxin disables
Berserker's Blood, which Huskar relies upon for attack speed and healing.
* The damage from Burning Spear and
Life Break is largely absorbed by
Corrosive Skin. It also will return some damage, making it risky to use Burning Spears in the laning stage.
* Because Huskar wants to be on low health for Berserker's Blood, he is particularly vulnerable to
Poison Attack.
Additional:
* His Poison Attack is very useful against Huskar, since he tends to stay at low health.
* Nethertoxin disables passive skills like Berserker's Blood.
* It is dangerous for Huskar to jump on Viper because Corrosive Skin and
Viper Strike with the slowdown of movement and attack speed which usually will be deadly for Huskar.
* Huskar's damage over time gives Abaddon the opportunity to shield and heal his allies.
* Borrowed Time also makes Abaddon a hard support to gank, thus negating Huskar's early game dominance.
* Most of Magnus' abilities except Empower will trigger damage through
Corrosive Skin.
* Poison Attack and
Viper Strike can slow Magnus during
Skewer, as well as putting his
Blink Dagger on cooldown, preventing him from initiating or re-initiating.
* Any hero who can survive Magnus's initiations and manfight him: Huskar,
Faceless Void,
Weaver,
Abaddon,
Troll Warlord,
Alchemist,
Dragon Knight,
Night Stalker,
Viper.
* Poison Attack makes it hard for Void Spirit to lane against him.
* Corrosive Skin reduces the magical damage from Void Spirit's spells.
* Heroes that can purge his slow and disables are very difficult to go on and their team: Abaddon,
Oracle.
* Nethertoxin breaks Multicast.
* Corrosive Skin minimizes the damage from Ignite and Fireblast.
* In general, heroes that deal burst in multiple instances will trigger Borrowed Time and heal Abaddon for a large amount, such as Skywrath Mage,
Techies,
Juggernaut,
Shadow Shaman, or
Ogre Magi.
* Nethertoxin negates
Essence Shift and the regeneration aspect of
Shadow Dance.
* Dark Pact doesn't mean a lot against Viper's ubiquitous slows.
* Viper becomes a relevant presence in team fights before Slark can procure his standard items (e.g. Shadow Blade).
* Heroes that can deny Slark early kills will prevent him from snowballing: Dazzle,
Abaddon.
* Corrosive Skin gives Viper additional resistance to Phoenix's magical damage, and since they deal damage over time, Phoenix would be constantly afflicted by his passive's own debuff, making him not an ideal target for Phoenix's harassment. Phoenix's abilities also constantly drain its own health away, becoming more vulnerable to
Poison Attack.
* Heroes that deal damage over time will also fail to bring down Abaddon and his allies, such as Huskar,
Venomancer, or
Phoenix.
* Viper's poison abilities can slow Bounty Hunter's movement speed and allows to chase him with True Sight items.
* Nethertoxin can break Jinada, and the silence from level 25 prevents Bounty Hunter from using all of his spells.
* Abaddon with
Aphotic Shield and
Borrowed Time
* Heroes that can remove the Track debuff with their skills:
* Abaddon with
Aphotic Shield and
Borrowed Time
* Huskar with
Life Break
* Juggernaut with
Blade Fury
* Legion Commander with
Press the Attack
* Lifestealer with
Rage and
Infest
* Naga Siren with
Mirror Image
* Omniknight with
Heavenly Grace
* Oracle with
Fortune's End and
False Promise
* Phantom Lancer with
Doppelganger
* Slark with
Dark Pact
* Ursa with
Enrage
* Weaver with
Time Lapse
* Tidehunter with
Kraken Shell when damage received reaches the threshold.
* Viper does large amounts of magic damage over time, meaning that if a Necrophos uses Ghost Shroud, Viper's abilities will greatly reduce Necrophos survivability, and may actually kill him.
* By the same token, Viper can use his Viper Strike on Necrophos if he attempts to heal himself with Ghost Shroud, and depending on any other effects Necrophos may have from him, (IE:
Poison Attack,
Corrosive Skin), Viper can often kill Necrophos while he is in his Ghost Shroud.
* Viper's Corrosive Skin helps him take reduced damage from all of Nercophos spells that deal magical damage, which is Necrophos's only source of damage.
Additional:
* Nethertoxin prevents
Heartstopper Aura from dealing damage or healing Necrophos.
* Viper's magic damage is amplified whenever Ghost Shroud is used.
* Corrosive Skin makes Viper tankier against
Death Pulse and
Reaper's Scythe.
* Heroes who possess abilities that can save targets from being killed by Reaper's Scythe: Abaddon,
Bane,
Outworld Destroyer,
Shadow Demon,
Omniknight, etc.
Additional:
* If he isn't silenced, Abaddon can use Borrowed Time to escape Reaper's Scythe during the delay.
* Hand of God has a long cooldown, so damage over time spells can be hazardous for Chen, forcing him to use it prematurely: Jakiro,
Venomancer,
Viper,
Dazzle,
Phoenix.
* Aphotic Shield can nullify Chen's combo, while clearing Chen's creeps simultaneously.
* Nyx Assassin might not kill Abaddon with his nuke, but a support Abaddon will struggle to protect an ally from him.
* Corrosive Skin minimizes the damage from
Impale and
Mind Flare.
* Nyx Assassin cannot survive several poison damage-over-time, even Spiked Carapace is activated.
* Impale and
Spiked Carapace stun can be instantly dispelled by Aphotic Shield.
* Abaddon can use Borrowed Time and easily heal for the duration of Borrowed Time by Nyx's burst damage.
* Nethertoxin prevents Timbersaw from gaining stacks on Reactive Armor.
* Aphotic Shield and
Borrowed Time can both dispel Flaming Lasso.
Additional:
* Sticky Napalm,
Flaming Lasso, and
Flamebreak can all be instantly dispelled by Aphotic Shield.
* Firefly will continuously heal Abaddon under Borrowed Time.
* Aphotic Shield prevents damage and dispels the slow from Snapfire's
Mortimer Kisses.
* Borrowed Time allows Abaddon to gain HP during Snapfire's
Mortimer Kisses.
* Tiny has low movement speed and attack speed, making him vulnerable to Viper's slows.
* Corrosive Skin provides magic resistance to lower Tiny's magic burst damage.
* Nethertoxin prevents the buildup of
Jingu Mastery stacks.
* Monkey King's high base movement speed is of little worth against the array of slows Viper possesses.
* All of Viper's magical damage over time stops Monkey King from using Tree Dance. It also ignores the extra armor bestowed by
Wukong's Command.
Additional:
* Nethertoxin prevents the buildup of Jingu Mastery stacks.
* Viper's poison magical damage-over-time stops Monkey King from using Tree Dance. It also ignores the extra armor bestowed by Wukong's Command.
* Dragon Knight is easily harassed by Poison Attack after the laning stage ends.
* Corrosive Skin protects Viper from
Breathe Fire and returns damage.
* Nethertoxin mitigates
Dragon Blood, Dragon's Knight main source of armor and health regeneration.
* Between Poison Attack and
Viper Strike, Viper can keep Dragon Knight permanently slowed even in
Elder Dragon Form.
Additional:
* In the early game, a Dragon Knight without Black King Bar is basically defenseless against Viper.
* Viper can harass Dragon Knight at any time with his Poison Attack.
* Corrosive Skin reduces damage from Dragon Fire and inflicts damage to him.
* Nethertoxin disables Dragon Blood, negating his main survivability.
* Viper Strike and
Poison Attack can severely slow him down even with his Elder Dragon Form.
* Nethertoxin cancels out
Kraken Shell and stops the hard dispel from passively activating, preventing Tidehunter from functioning as a frontline tank.
* Anchor Smash is mostly irrelevant against a ranged hero.
* Tidehunter relies on the threat of Ravage, which has an obscenely long cooldown. Viper can exploit the downtime with his short cooldowns.
* Abaddon can remove Sacred Arrow's stun from his teammates with Aphotic Shield, or remove it from himself with
Borrowed Time.
* Borrowed Time makes Abaddon almost impossible to burst down with Mirana's
Aghanim's Scepter combo.
Additional:
* Sacred Arrow can be instantly dispelled by Aphotic Shield.
* Abaddon can activate Borrowed Time to dispel Dismember; breaking the disable and potentially allowing Abaddon to escape.
* Aphotic Shield can be cast on an ally to dispel the stun of Dismember, which can make kills difficult to secure, given that Dismember is Pudge's only reliable disable.
* Pudge lacks a mobility without a Blink Dagger, causing him to be easily chased with
Curse of Avernus. The silence also prevents him from toggling off his Rot.
* Nethertoxin breaks Sniper's passives.
* Corrosive Skin allows Viper to deal more damage to Sniper than Sniper deals to him when laning, especially by briefly stepping into Shrapnel.
* Viper Strike together with
Poison Attack can slow Sniper and tears through his low health and mobility.
* Viper's Poison Attack and
Viper Strike that can slow Razor, and is one of the few heroes that can keep him immobile.
* Altogether, Viper's skills reduce Razor's attack speed, heavily reducing the benefit of the damage drain from Static Link.
Additional:
* Storm Surge is counteracted by
Nethertoxin, leaving Razor without faster MS.
* Static Link's damage drain doesn't bother Viper a lot as most of his early to mid game damage is magical.
* Nethertoxin breaks Fury Swipes, making Viper a decent counter to Ursa in a laning stage.
* Viper Strike is a strong, undispellable slow, making it much easier to kite Ursa for everyone.
* Nethertoxin disables
Bristleback and prevents
Warpath from building stacks. Besides losing his defensive passive, Bristleback also loses his ability to build up damage over lengthy battles.
* Viper can perpetually kite Bristleback with Poison Attack and
Viper Strike.
Additional:
* Nethertoxin disables Bristleback's passive.
* Viper Strike and
Poison Attack slow down Bristleback's movement speed, making him unable to get out from Nethertoxin.
* The damage over time from Viper's Poison Attack and
Viper Strike rapidly wear down Refraction charges, allowing Templar Assassin to be damaged. Additionally,
Corrosive Skin causes her attacks to apply damage overtime on her as well.
* Nethertoxin is a big threat to Templar Assassin. Her initially low range making it very hard to deal against Nethertoxin in the laning phase. At any stage of the game, a Nethertoxin can always force her to undo her Meld.
Additional:
* All of Viper's abilities quickly burn through Refraction charges.
* Templar Assassin's short range, aside from Psi Blades' spill damage, makes her vulnerable to
Poison Attack harassment.
* Templar Assassin traditionally forgoes health and armor items for damage. Outside of Black King Bar, Viper will almost always be able to kill her when
Refraction is down.
* Nethertoxin breaks both Necromastery and Presence of the Dark Lord, reducing his damage massively.
* Corrosive Skin gives Viper bonus Magic Resistance against Shadowraze and Requiem of Souls.
* Viper can easily take advantage of Shadow Fiend's lack of escape and mobility spells with Viper Strike and
Poison Attack. Poison Attack also serves as a great way to harass Shadow Fiend.
* Aphotic Shield is a strong dispel, meaning it can save allies from Earth Spirit's stun, slow, silence, and Magnetize.
* Borrowed Time makes it nearly impossible for Earth Spirit to kill Abaddon.
* Mist Coil and
Aphotic Shield enable Abaddon to keep an ally alive during Chronosphere.
* Borrowed Time prevents Faceless Void from killing Abaddon during his Chronosphere.
* Borrowed Time makes Abaddon nearly impossible to gank.
* Aphotic Shield and
Mist Coil prevents Bloodseeker from gaining his Thirst bonuses.
Additional:
* If Rupture is used on Abaddon, Abaddon can use Borrowed Time and easily heal for the duration of Borrowed Time by simply moving.
* Exorcism will continuously heal Abaddon under Borrowed Time, and cannot be turned off.
* {Ability ID:Spirit Siphon|Death Prophet} will continuously heal Abaddon under Borrowed Time, for a percentage of his maximum health.
* Borrowed Time allows him to both exit his stuns prematurely and turn Trample into healing for himself. His Aghanim Scepter only prevents the automation of the spell, Abaddon himself can still manually activate it.
* Aphotic Shield will immediately debuff any stuns Primal Beast has put on allies but won't stop him from being stunned if casted on Abaddon.
* Aphotic Shield removes silences, slows and stuns, possibly foiling a full-duration Mystic Flare.
* Borrowed Time makes it impossible to burst
Abaddon down, even healing him up due to Mystic Flare's damage.
* Borrowed Time mitigates the damage by Pierce the Veil for most of its duration.
* Muerta has no control over Gunslinger, making her one of the best heroes for Abaddon to regenerate from via Borrowed Time.
* Nethertoxin disables
Desolate and
Dispersion, leaving Spectre with far less damage output and damage mitigation in engagements.
* Spectre is one of the weakest heroes at early levels. Viper can stifle her farm with early fights before Spectre purchases any major items.
Additional:
* Nethertoxin disable passives, negating Spectre's damage and survivability by removing both
Dispersion and
Desolate.
* Due to Haunt and
Radiance's burn, Spectre is heavily susceptible to being persistently slowed and damaged by
Corrosive Skin without even directly attacking Viper.
* Poison Attack and
Viper Strike further slow Spectre's movement speed to a crawl, while his improved magic resistance means he can easily shrug off
Radiance's burn.
* Nethertoxin disables Dawnbreaker's
Luminosity. Since she's a melee hero, she needs to close gap to attack and Nethertoxin will be bad for her since she cannot heal.
* Viper Strike and
Poison Attack will severely slow her down and combined with
Nethertoxin, it will be her death sentence (unless her Celestial Hammer or Solar Guardian are off cooldown). Besides that, chasing her down will be easy due to the slow.
* Nethertoxin prevents the lifesteal from Ransack.
* Meepo and his clones have a lack of magic resistance, so they're vulnerable to Poison Attack &
Viper Strike directed onto one clone.
* Viper's Nethertoxin disables
Cloak and Dagger, negating Riki's invisibility and much of his damage. It also makes him more vulnerable to magic damage, which does not go well with Riki's low health pool. With the talent applied, he can't even blink to safety or hide with Tricks of the Trade.
* Corrosive Skin makes it hard for Riki to chase Viper and attack him due to the attack speed slow.
* Viper Strike stays on Riki even after he goes invisible.
* Poison Attack makes it risky for Riki to get last hits and can make the laning phase difficult for him.
* Poison Attack and
Viper Strike allowing to kite and slow Earthshaker significally, putting
Blink Dagger on cooldown and preventing him from initiating or re-initiating.
* Nethertoxin breaks Aftershock. The silence from Level 25 talent also prevents Earthshaker from initiating or re-initiating.
Additional:
* Being a melee hero, Earthshaker's movement is liable to suppression by Poison Attack and
Viper Strike.
* Earthshaker's kit, with the exception of Enchant Totem, deals magic damage.
Corrosive Skin effectively blunts his killing potential with a standard Blink combo among other things.
* Nethertoxin disables
Aftershock, which removes the stun and bonus damage from
Enchant Totem and
Echo Slam.
* Corrosive Skin counters Zeus in lane by canceling the effects of
Clarity as Zeus relies on Arc Lightning to farm and secure last hits.
* Corrosive Skin also increases Viper's magic resistance to shrug off Zeus's magical nukes.
* Nethertoxin breaks Static Field.
* Due to Zeus' poor mobility, Viper Strike will cripple Zeus and will allow Viper and his teammates to land a lot of attacks.
Additional:
* Corrosive Skin severely reduces Zeus's damage output throughout the game.
* During the laning stage, Viper can abuse Zeus' reliance on spells by hugging the creep wave. Zeus will take constant damage over time from Corrosive Skin unless he drives Viper from the lane or returns to farming in his absence.
* Prior to buying Blink Dagger or
Force Staff, Zeus is fragile and possesses low mobility. Any of Viper's numerous slows can set up an easy kill.
* Abaddon can cast Aphotic Shield on any of his allies to immediately dispel Corrosive Haze and/or the stun and the slow components of Slithereen Crush.
* All of Slardar's debuffs are also removed if Abaddon's Borrowed Time triggers.
* Nethertoxin disables Vengeance Aura.
* Vengeful Spirit has no mobility spells aside from Nether Swap, which Viper can take advantage of with his slows.
* Viper can easily bully Vengeful Spirit out of a lane with Poison Attack.
Additional:
* Nethertoxin prevents the attack damage bonus from
Vengeance Aura and the components of
Nether Swap.
* Both Magic Missile and
Wave of Terror are counteracted by
Corrosive Skin, making Vengeful Spirit's fighting harder against Viper.
* Nethertoxin cuts off
Gravekeeper's Cloak, Visage's primary defense mechanism.
* Viper can ignore Grave Chill's attack speed slow with his magic damage output.
Additional:
* Since Visage is a slow hero, Viper can easily kite him with
Poison Attack and
Viper Strike while successfully chipping away at Gravekeeper's Cloak.
* Nethertoxin removes all layers of Gravekeeper's Cloak, leaving Visage exposed.
* Corrosive Skin makes Viper highly resistant to Soul Assumption.
* Heroes with break can disable Untouchable for a while: Doom and
Shadow Demon (via
Aghanim's Scepter),
Viper,
Shadow Shaman with Hex Breaks talent.
* Heroes who can easily harass Crystal Maiden out of lane in the early game (Clinkz,
Viper) can prevent Crystal Maiden from being able to level effectively, and can ultimately slow down her level 6, 12, and 18 to a point where enemy carries already have items to address her ultimate.
* Doom will make Abaddon unable to use Mist Coil, Aphotic Shield, and the active component of Borrowed Time, also upgraded with
Aghanim's Scepter can break Curse of Avernus and the passive component of Borrowed Time ,which means his allies could be easily disabled or killed.
* The slow applied from Corrosive Skin offsets the movement speed bonus granted by Scorched Earth and the tick-based damage from Infernal Blade and Doom will continually slow Doom down. This allows Viper, much like Sniper, to 'kite' Doom and keep him at a safe distance between the two. Additionally,
Corrosive Skin applies an attack-speed slow which is fairly crippling to a hero such as Doom that, naturally, has a high base attack-time, poor agility gain and builds little attack-speed items.
* Since Doom does not disable auto-cast abilities, Viper's Poison Attack will continue to work. Doom may find it hard to close the distance between himself and Viper, and thusly difficult to effectively lockdown and continually deal damage through his abilities.
* Heroes with the ability to heal allies, or those with good defensive abilities: Chen,
Dazzle,
Io,
Oracle,
Omniknight,
Witch Doctor,
Winter Wyvern,
Abaddon, etc.
* Clockwerk lacks burst damage, and that makes him vulnerable to heroes who can recover themselves and turn the fight around to their advantage after Clockwerk finishes his initiation. Additionally, Clockwerk hates buying Dagon and
Ethereal Blade, which are the only itmes that can help him deal with heroes who can recover themselves and turn the fight around to their advantage:
Faceless Void,
Terrorblade,
Ursa,
Weaver,
Broodmother,
Slark,
Abaddon,
Wraith King,
Lifestealer.
* In general, heroes that deal burst in multiple instances will trigger Borrowed Time and heal Abaddon for a large amount, such as Skywrath Mage,
Techies,
Juggernaut,
Shadow Shaman, or
Ogre Magi.
* Lina is a common Eul's Scepter of Divinity carrier which can waste some duration of Borrowed Time and following up with
Laguna Blade if timed correctly.
* Nethertoxin prevents buildup of Fiery Soul stacks.
* Corrosive Skin provides magic resistance against Lina's spells.
* Poison Attack and
Viper Strike can burn away Lina's small health pool.
* Both Lion's
Finger of Death and
Lina's
Laguna Blade have a 0.25 second delay before the damage is dealt.
* Heroes that can slow Charge of Darkness by a huge amount: Venomancer,
Viper,
Dazzle,
Arc WardenLion
* Melee heroes with low mobility can be kited and killed by Viper: Treant Protector,
Kunkka,
Alchemist,
Troll Warlord,
Wraith King,
Tiny,
Sven.
* Melee heroes with low mobility can be kited and killed by Viper: Treant Protector,
Kunkka,
Alchemist,
Troll Warlord,
Wraith King,
Tiny,
Sven.
* Heroes who can harass Omniknight out of lane will keep him weak in the mid game: Viper,
Venomancer,
Clinkz.
* Melee heroes with low mobility can be kited and killed by Viper: Treant Protector,
Kunkka,
Alchemist,
Troll Warlord,
Wraith King,
Tiny,
Sven.
* Heroes that can apply early pressure before Phantom Assassin has farm are massive threats: Axe,
Viper,
Meepo,
Pugna,
Slark etc.
* Viper has no response to the standard initiation combo of Reality Rift into
Chaos Bolt.
* Phantasm and
Chaos Strike can eliminate Viper almost instantly with it's damage output.
* Besides Nethertoxin, Viper has no other ways of dealing with Phantasm.
Additional:
* As Viper focuses on single-target damage, he has trouble fighting off Phantasm illusions.
* Reality Rift counteracts Viper's slows and reduces his already low durability against physical damage.
* Heroes with Attack speed decreasing skills: Jakiro,
Viper
Lich
* Abaddon could punish Chaos Knight for using his Phantasm and Reality Rift combo on him with Aphotic Shield. Additionally, it provides extra protection against Chaos Knight's potential to take Abaddon down quickly.
* Furthermore, Abaddon's Borrowed Time makes it utterly impossible to burst Abaddon down, effectively reducing the amount of targets Chaos Knight can threaten by 1 for the entire game.
* Melee heroes with low mobility can be kited and killed by Viper: Treant Protector,
Kunkka,
Alchemist,
Troll Warlord,
Wraith King,
Tiny,
Sven.
* Melee heroes with low mobility can be kited and killed by Viper: Treant Protector,
Kunkka,
Alchemist,
Troll Warlord,
Wraith King,
Tiny,
Sven.
* Heroes who cannot fight back during Arena of Blood in the early and mid game: Abaddon,
Anti-Mage,
Broodmother,
Luna,
Sniper,
Troll Warlord,
Weaver,
Clinkz.
* Nethertoxin disables
Bulwark entirely, making Mars far less tanky. Using
Nethertoxin inside
Arena of Blood may discourage enemies from following up with Mars' initiation.
* Rod of Atos is currently common on Viper and keeps Mars in position long enough to be killed.
* Beware that Viper is not very tanky earlier in the game, so positioning against Mars is important since a well-timed Spear of Mars can be the end of Viper.
Additional:
* Nethertoxin breaks the damage block from Bulwark.
* Poison Attack and
Viper Strike's slows make it difficult for Mars to contribute to fights due to his low mobility.
* Viper cannot interrupt heroes with powerful channeling abilities: Bane,
Enigma,
Shadow Shaman,
Warlock
* Borrowed Time can give Abaddon a second chance after a Black Hole combo.
* Aphotic Shield can be used to save allies or Abaddon himself from Malefice.
* Abaddon can easily heal himself as well as his allies during a team fight, especially with Aghanim's Scepter upgraded
Borrowed Time.
* Heroes that can drain mana negatively affect Viper's ability to use Poison Attack, Nethertoxin and Viper Strike: Lion,
Anti-Mage
* Aphotic Shield applies strong dispel on targeted allies, while
Borrowed Time does the same on
Abaddon himself upon both casts (manually or automatically), removing disables, such as
Earth Spike and
Hex.
* Abaddon may offer survivability to
Lion's nuke power by shielding and healing allies and himself.
* Lack of inner escape and defensive mechanisms increases Curse of Avernus effectiveness, since it slows per stack (applied upon auto attacking), and silences when it reaches the maximum stack.
* Illusion or summon-based heroes can be a problem to Viper due to his lack of AoE damage: Naga Siren,
Phantom Lancer,
Beastmaster
* Aphotic Shield effectively nullifies Primal Roar's single-target initiation on allies.
* Even being initiated by Primal Roar, Borrowed Time can make Abaddon extremely difficult to kill.
Additional:
* Primal Roar can be instantly dispelled by Aphotic Shield.
* The debuffs from Wild Axes and
Poison from
Call of the Wild: Boar can also be dispelled by Aphotic Shield.
* Culling Blade ignores Borrowed Time should Abaddon's health falls under the threshold.
* Aphotic Shield does nothing against Berserkers Call and has to be used constantly to remove the very small mana cost of Battle Hunger in lane.
Additional:
* Culling Blade's instant kill is not prevented by Borrowed Time should Abaddon's health falls below the threshold.
* Poison Attack and
Viper Strike slows Axe significantly, and puts his
Blink Dagger on cooldown, preventing him from initiating.
* Nethertoxin can break Counter Helix.
Additional:
* Nethertoxin prevents
Counter Helix from triggering, which significantly lowers Axe's damage output in the early to mid game.
* Viper's various slows and damage over time prevents Axe from initiating as well as putting his Blink Dagger on cooldown.
* Viper's frailty and low mobility make him an enticing Duel target and Corrosive Skin doesn't protect him against Legion Commander physical attacks.
* Press the Attack can dispel Poison Attack.
* Viper slows can easily negate by Overwhelming Odds movement speed.
* If he isn't broken (break), Abaddon can use Borrowed Time to waste Legion Commander's Duel, As Borrowed Time has a shorter cooldown, Legion Commander can't win duels, effectively reducing her targets by one, Duel also means that Borrowed Time heals Abaddon for the duration of the duel, as Legion can't stop attacking.
Additional:
* Aphotic Shield and
Mist Coil makes it hard for Legion Commander to kill Abaddon's teammates in Duels.
* Borrowed Time makes Abaddon nearly impossible to kill in Duels, and often replenishes much of his health because Legion Commander cannot manually stop attacking during Duels.
* Enfeeble weakens Viper's attack damage, any healing he receives and his cast range, which makes him unable to harass enemy heroes with Nethertoxin, Poison Attack and Viper Strike.
* Viper's Corrosive Skin is useless against Bane as all of his damaging abilities deal Pure damage.
* Viper has no solutions to cancel Fiend's Grip and in addition, he hates buying disabling items like
Eul's Scepter of Divinity.
* Aphotic Shield applies a strong dispel on the allied target and can be used to remove both Fiend's Grip & Nightmare.
* Borrowed Time applies a strong dispel on Abaddon and can instantly remove both Fiend's Grip & Nightmare when activated.
* Bane, when caught by Curse of Avernus struggles to escape because of his innately low mobility.
Additional:
* Nightmare and
Fiend's Grip can be instantly dispelled by Aphotic Shield.
* Bane lacks mobility, therefore becoming helpless when silenced by Curse of Avernus.
* Heroes that have long silences, such as Night Stalker and
Silencer, will prevent Abaddon from saving his allies effectively and disable the active component of Borrowed Time.
* Heroes with damage-increasing passive abilities, such as Viper and
Riki, will usually kill Silencer in a short time before he even has time to set up his abilities.
* Ice Blast nullifies Borrowed Time's and
Mist Coil's healing.
Additional:
* Ice Blast's nullifies Abaddon healing from Borrowed Time and Mist Coil and it is not dispelled by Aphotic Shield.
* Corrosive Skin minimizes the damage Viper takes from all of Ancient Apparition's abilities.
* Ancient Apparition's slow movement speed, squishy nature, and lack of escape abilities can easily be taken advantage of through Poison Attack and
Viper Strike.
* Viper cannot interrupt heroes with powerful channeling abilities: Bane,
Enigma,
Shadow Shaman,
Warlock
* Omniknight can dispel Hex or Shackles with
Heavenly Grace. He can also heal teammates which you disabled. The same goes to
Abaddon's
Aphotic Shield .
* Ice Wall and
Ghost Walk can be used to kite and escape from Viper.
* Chaos Meteor and
Sun Strike deal heavy damage and can quickly bring Viper down.
* Cold Snap,
Tornado, and
Deafening Blast are powerful disables that reduce Viper's effectiveness.
* E.M.P. burns Viper's limited mana pool, reducing his potential poison damage.
* Forge Spirits can melt Viper's armor and reduce his durability.
* Corrosive Skin makes Viper receive less damage from Invoker's spells
* Viper can harass Invoker with his Poison Attack in the early game.
* Viper Strike and
Poison Attack can kill Invoker easily if Ghost Walk is on cooldown.
To start select enemy heroes in the field above. It's intended to be used with multiple heroes. The more enemy heroes you provide the better results you will get.
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You will get the list of recommended hero counters with a list of tips written by Dota 2 wiki contributors explaining why it's good against the particular hero. In comparison to other similar websites, which show only rating based on average hero win rate from dotabuff or similar service.
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Viper
* Illusion or summon-based heroes can be a problem to Viper due to his lack of AoE damage:
Naga Siren,
Phantom Lancer,
Beastmaster
Corrosive Skin with Mirror Image.
Aghanim's Shard upgraded
Song of the Siren heal her allies before Viper can finish them off.
Additional:
* Naga Siren can easily disjoint, and dispel
* Since Viper is mostly a single-target hero, he will not have almost any chance against Naga Siren because she is an illusion based hero.
* Viper has no burst damage, so Naga Siren will have plenty of time to use
Abaddon
*
Song of the Siren completely wastes Abaddon
Borrowed Time while keeping him in place.
Curse of Avernus with
Mirror Image before getting hit 4 times consecutively.
Aphotic Shield, Naga Siren can resolve that issue easily by purchasing
Heart of Tarrasque to drastically increase her durability. Plus, the said item makes Naga Siren harder to be distinguished from her illusions.
* Naga Siren is able to simply dispel Abaddon's
* Although Naga Siren's illusions can be easily destroyed by