Viper

Viper 21 + 2.4 21 + 2.5 15 + 1.8
	Grants the following bonuses per point of attribute:
	+22HP and +0.1HP regeneration
	+0.17 armor and 1 attack speed; +1 main attack damage
	+12MP and +0.05MP regeneration; +0.1% base magic resistance ;
L0	Base Hero Values
L1	⤷ + Base Attributes
L15	⤷ + Attribute Gain
L25	⤷ + 6 levels of Attribute Bonus
L30	⤷ + 7 levels of Attribute Bonus
	All values shown are without talent bonuses.
Attack Animation	0.33 + 1
Gib Type	Goo
Internal	Not Provided

Hero

Strategy

Equipment

Viper, the Netherdrake, is a ranged agility hero who functions as an excellent nuker, ganker and carry due to his assortment of low-cooldown spells and debilitating attacks. His modus operandi is to whittle away his opponents' vitality over long stretches of time while they fail to inflict fatal damage. To that end Viper wields magic-based abilities focused on inhibiting speed and defenses. He infects his quarry with Poison Attack, a seemingly innocuous liquid that rapidly burns away more health as they became sicker, while drowning them in noxious pools which block their innate powers. Meanwhile Corrosive Skin fortifies him against magic damage and poisons those who dare strike him. For impervious foes he reserves his most powerful venom, Viper Strike, as a surprise gift. A slow tank that dominates the early stages of a game, Viper depends on consolidating that advantage before opponents can afford to exploit his weaknesses.

Bio

Viper, the Netherdrake

▶️ "You've failed the acid test."

Lore:

The malevolent familiar of a sadistic wizard who captured and hoped to tame him, Viper was curiously glad to have been sprung from the sealed and unchanging subterranean Nether Reaches where his race had lived for millions of years, after tectonic slippage had sealed off the Netherdrakes in luminous caverns. Viper spent some time appearing to submit to the wizard's enchainments, hoping to learn what he could of the dark magics the mage practiced. But he soon realized that few spells were as deadly as the toxins that were his birthright. Exuding an acid that swiftly ate away the bars of his cage, the Netherdrake slipped free of his confines, spit poison in the old spellcaster's eyes, and soared out to let the world know that it had a new master.

Voice:

Tony Todd (Responses)

Abilities

Poison Attack

▶️QC

Ability
Target Unit / Autocast

Affects
Enemies

Damage
Magical

Intensifies Viper's venom, adding an effect to his normal attack that slows attack and movement speed while dealing damage over time based on the amount of health the target is missing.

Cast Range: 600 (

640)

Damage per Missing Health Percentage: 0.5/0.75/1/1.25

Move Speed Slow: 10%/20%/30%/40%

Attack Speed Slow: 10/20/30/40

Duration: 3

6/4/2/0

40/35/30/25

Modifiers []

Poison Attack Slow

Any

The Netherdrake's inborn toxic breath quickly drains the vitality of its afflicted.

Casting Poison Attack manually uses the 600 ( 640) cast range. Attacking normally with Poison Attack on autocast uses Viper's 575 ( 615) attack range.

Deals damage in 1 second intervals, starting 1 second after the debuff is applied, resulting in 3 damage instances.

The damage is based on the target's current to maximum health ratio. For each percentage of missing health, the damage increases.
- For example, a target with 400/1000 health will take 30/45/60/75 damage on the next tick, since it is missing 60% health.

Successive casts of Poison Attack on the same target do not stack, only the debuff gets refreshed.

The attacks first apply the debuff, then their own damage.

The level 20 talent allows Poison Attack to target buildings, damaging and slowing them.

Nethertoxin

WR

Ability
Target Area

Affects
Enemies

Damage
Magical

Viper releases a Nethertoxin at the targeted area. Units in that area take damage over time, have lower resistance and their passives do not work.

Cast Animation: +

Cast Range: 900

Radius: 380

Damage per Second: 30/45/60/75

Magic Resistance Reduction: 10%/15%/20%/25%

Aura linger duration: 0.5

Duration: 8

6

70/80/90/100

Modifiers []

Nethertoxin

Poison from the Nether Reaches turns wounds into fatalities, and fatigue into death.

Nethertoxin's projectile travels at a speed of 2000.

All effects of Nethertoxin (including the damage) are provided by an aura. Its debuff lingers for 0.5 seconds.

Reduces most heroes' total magic resistance to 18%/14%/10%/6%, assuming basic 25% magic resistance and no other sources of magic resistance.

Deals damage in 1-second intervals, starting 1 second after receiving the debuff, resulting in up to 8 instances.

Can deal up to 240/360/480/600 damage to a single unit (before reductions).

Multiple instances of Nethertoxin's debuff do not stack.

When leveling up the ability, the magic resistance reduction and damage on already affected units do not update.
- However, if an enemy receives the debuff after leveling it up, that enemy receives the new magic resistance reduction and damage values.
- Choosing the talent which adds the silence immediately updates all already existing debuffs.

Corrosive Skin

▶️EE

Ability
Passive

Affects
Self / Enemies

Damage
Magical

Viper exudes an infectious toxin that damages and slows the attack speed of any enemy that damages it in a 1400 radius. The acid exudate also increases Viper's resistance to magic.

Max Proc Distance: 1400

Magic Resistance Bonus: 10%/15%/20%/25% (

25%/30%/35%/40%)

Damage per Second: 8/16/24/32 (

23/31/39/47)

Attack Speed Slow: 8/16/24/32 (

23/31/39/47)

Duration: 4

Modifiers []

Corrosive Skin Slow

Any

It is not unusual for sword and shield alike to corrode in the very hands of those who attack the Netherdrake.

Magic resistance stacks multiplicatively with other sources of magic resistance.

Increases Viper's total magic resistance to 33%/36%/40%/44% ( 44%/48%/51%/55%), assuming his basic 25% magic resistance and no other sources of magic resistance.

The damage and slow debuff is applied to whoever damages Viper within 1400 range of him.

Corrosive Skin's damage has the no-reflection flag, preventing its damage from interacting with other sources of damage with the same flag.

Only reacts on the 3 damage types. Does not react on damage flagged as HP Removal.

Damage dealt by abilities that use an independent source of damage (e.g. Proximity Mines, Death Ward) does not trigger Corrosive Skin on the caster.

Deals damage in 1 second intervals, starting 1 second after the debuff is applied, resulting in 4 damage instances.

Can deal a total of 32/64/96/128 ( 92/124/156/188) damage (before reductions).

Successive procs of Corrosive Skin on the same target do not stack, only the debuff gets refreshed.

Does not affect buildings, wards or invulnerable units.

Viper Strike

▶️RV

Ability
Target Unit

Affects
Enemies

Damage
Magical

Viper slows the targeted enemy unit's movement and attack speed while also dealing poison damage over time. The slowing effect reduces over the duration of the poison.

Cast Animation: +

Cast Range: 500 (

900)

Damage per Second: 60/100/145 (

140/180/225)

Move Speed Slow: 40%/60%/80%

Attack Speed Slow: 40/60/80

Duration: 5

50/40/30 (

10)

125/175/250 (

125)

Aghanim's Scepter Upgrade:

Decreases mana cost and cooldown, and increases cast range.

Modifiers []

Viper Strike Slow

Once used to slay his sadistic summoner, the most powerful of Netherdrake infections spreads through the veins of those foolish enough to cross Viper.

Viper Strike's projectile travels at a speed of 1200.

The slow decreases over time. Hit units regain 0.3%/0.4%/0.5% of their movement speed and 0.267/0.4/0.533 attack speed on each server tick.
- This translates to 8%/12%/16% movement speed and 8/12/16 attack speed regained per second.

Deals damage in 1 second intervals, starting immediately as the debuff is applied, resulting in 5 damage instances.

Can deal up to 300/500/725 ( 700/900/1125) damage (before reductions).

Successive casts of Viper Strike on the same target do not stack, only the debuff gets refreshed.

The particle effects on Viper's wings during the cast time are visible to everyone, showing that the spell is being cast.

Talents

Hero Talents
-50% Viper Strike manacost/cooldown	25	Become Universal
+20% Poison Attack slow/damage	20	+80 Viper Strike DPS
+15% Corrosive Skin Magic Resistance	15	+40 Nethertoxin Min/Max Damage
+18 Corrosive Skin Damage Per Second	10	+4% Poison Attack Magic Resistance Reduction

Recommended items

Gameplay



It was foolhardy to try and tame a Netherdrake, a lesson the old wizard learned in death. Freed from his captor, Viper spread his wings and went forth to explore the surface world. His Poison Attacks cause joints to harden, crippling foes whether they choose to flee or fight. Nethertoxin spreads throughout their body, sapping the will and weakening the spirit. The Netherdrake's tough, Corrosive Skin protects against spellcraft, and burns assailants with acid. But it is the dreaded Viper Strike that signals the beginning of the end. The afflicted victim staggers to a crawl, barely able to take his next step. If the Netherdrake doesn't finish him off, the venom in his veins will.

Roles:	Carry Durable Initiator Disabler
Complexity:
Adjectives:	Legs `( 2 )`

Strategy & Tips

Counters &
Matchups

Audio

Responses

Sounds

History

Lore

Old Abilities

Changelogs

Equipment

Trivia

Viper's response ▶️ "Holy shit, it's me!" is a reference to a scene of the movie Top Gun.^[1] Gyrocopter makes a similar, yet more accurate ▶️ response upon meeting him as an ally.
Viper's Chinese name is 冥界亚龙 (Míngjiè Yàlóng), a literal translation of "Netherdrake". However, Viper Strike's translation still uses the word "Viper" (蝮蛇, fùshé).