Dire
21 + 2.4
21 + 2.9
15 + 1.8
Movement Speed 275
Turn Rate 0.5
Day/Night Sight Range 1800/800
Attack Range 575
Missile Speed 1200
Attack Point 0.33
Base Attack Time 1.7
Level 1 16 25
Health 620 1380 2160
Mana 255 603 1011
Min Damage 44 89 133
Max Damage 46 91 135
Armor 0.94 7.24 13.4
Attacks / Second 0.71 0.98 1.24
Level Talents
10 +20 Attack Speed8% Spell Lifesteal
15 +100 Attack Range+6 Corrosive Skin Stats
20 +100 Viper Strike DPSPoison Attack Affects Buildings
25 Nethertoxin Silences+120 Damage
Bio

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.

Poison Attack
Ability: Target Unit, Auto-cast 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 how low the target is.
COOLDOWN: 6 / 4 / 2 / 0
MANA COST: 40 / 35 / 30 / 25
DURATION: 3.0
DAMAGE PER MISSING HEALTH PERCENTAGE: 0.25 / 0.5 / 0.75 / 1
%MOVE SLOW: -25 / -30 / -35 / -40
ATTACK SLOW: -25 / -30 / -35 / -40
Nethertoxin
Ability: Target Point 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.
COOLDOWN: 5
MANA COST: 75
DAMAGE PER SECOND: 20 / 30 / 40 / 50
RADIUS: 300
%MAGIC RESISTANCE REDUCTION: -10 / -15 / -20 / -25
DURATION: 8.0
Corrosive Skin
Ability: Passive 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.
DURATION: 4.0
ATTACK SLOW: 8 / 16 / 24 / 32
%MAGIC RESISTANCE: 10 / 15 / 20 / 25
DAMAGE PER SECOND: 8 / 16 / 24 / 32
MAX RANGE RADIUS: 1400
Ability:
Ability:
Viper Strike
Ability: Target Unit 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.

Upgradable by Aghanim's Scepter.
COOLDOWN: 50 / 40 / 30
MANA COST: 125 / 175 / 250
DURATION: 5.0
DAMAGE PER SECOND: 60 / 100 / 145
%MOVE SLOW: -40 / -60 / -80
ATTACK SLOW: -40 / -60 / -80
SCEPTER MANA COST: 125 / 125 / 125
SCEPTER COOLDOWN: 10.0
SCEPTER CAST RANGE: 900

Patch History

6.82 Corrosive Skin now only affects enemies within 1400 area of effect
6.82 Poison Attack is now properly dispellable
6.82 Corrosive Skin no longer triggers on another Corrosive Skin
6.79 Poison Attack cooldown reduced from 4/3/0/0 to 0
6.78 Corrosive Skin affects any damage source not just regular attacks
6.78 Viper Strike is no longer removed by Dark Pact or Kraken Shell
6.77 Base strength increased by 3
6.75 Nethertoxin max damage increased from 32/64/96/128 to 40/80/120/160
6.75 Corrosive Skin duration increased from 3 to 4
6.75 Viper Strike Aghanim's cast range increased from 800 to 900
6.74 Poison Attack damage increased from 6/12/18/24 to 10/16/22/28
6.74 Fixed Poison Attack damage not being lethal
6.72 Corrosive Skin now stacks with Poison Attack
6.71 Corrosive Skin damage, slow and magic resistance increased from 5/10/15/20 to 0/15/20/25
6.69 Viper Strike (Aghanim's version) mana cost reduced from 125/175/250 to 125
6.68 Added Aghanim's Scepter to Netherdrake
6.64 Movement speed decreased by 5
6.63 Movement speed decreased by 10
6.61 Nethertoxin now only works on enemy units
6.60 Replaced Frenzy with a new ability Nethertoxin
6.58 Viper Strike's cooldown reduced from 80 to 80/50/30 seconds