Viper

Launching deadly poison from a distance, Viper poses a grave threat to whomever he targets. As his various toxins eat away at an enemy's health and slow their movement, Viper simply does what he does best: he keeps adding more poison.

1Level 125
Attributes (Agility)
STR 21 (+2.40)
AGI 21 (+2.80)
INT 15 (+1.80)
Attack (Ranged)
Damage 44 - 46
Speed 121
Range 575
Point 0.33
Spell Damage 1.05%
Health, Mana & Resistances
Health 620 (+1.50)
Mana 255 (+0.90)
Armor 4.36
Magic Resistance 26%
Vision Range & Movement
Day 1800
Night 800
Speed 276
Turn Rate 0.50
Poison Attack
6.0
4.0
2.0
0.0
40
35
30
25
ABILITY: Unit Target, Auto-Cast
AFFECTS: Enemy Heroes, Enemy Creeps
DAMAGE TYPE: Magical
PIERCES SPELL IMMUNITY: No
DISPELLABLE: Yes
DURATION: 3
DAMAGE PER MISSING HEALTH PERCENTAGE: 0.25,0.5,0.75,1
%MOVE SLOW: -10,-20,-30,-40
ATTACK SLOW: -10,-20,-30,-40
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.

Successive casts don't increase slow or damage, but refresh the duration.
Nethertoxin
5.0
70
80
90
100
ABILITY: Point Target, AOE
DAMAGE TYPE: Magical
PIERCES SPELL IMMUNITY: No
DAMAGE PER SECOND: 30,45,60,75
%MAGIC RESISTANCE REDUCTION: -10,-15,-20,-25
RADIUS: 380
DURATION: 8
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.

Corrosive Skin
ABILITY: Passive
DAMAGE TYPE: Magical
PIERCES SPELL IMMUNITY: No
DISPELLABLE: Yes
DURATION: 4
DAMAGE PER SECOND: 8,16,24,32
ATTACK SLOW: 8,16,24,32
%MAGIC RESISTANCE: 10,15,20,25
MAX RANGE RADIUS: 1400
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.

Stacks multiplicatively with other magic damage resistance sources.
Viper Strike
50
40
30
125
175
250
ABILITY: Unit Target
AFFECTS: Enemy Heroes, Enemy Creeps
DAMAGE TYPE: Magical
PIERCES SPELL IMMUNITY: Yes
DISPELLABLE: No
DURATION: 5
DAMAGE PER SECOND: 60,100,145
%MOVE SLOW: -40,-60,-80
ATTACK SLOW: -40,-60,-80
SCEPTER CAST RANGE: 900
SCEPTER MANA COST: 125,125,125
SCEPTER COOLDOWN: 10
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.

Aghanim's Scepter Upgrade: Decreases mana cost and cooldown, and increases cast range.
Slow works on spell immune units.
Talent Tree
Level 25
Nethertoxin Silences
+120 Damage
Level 20
+100 Viper Strike DPS
Poison Attack Affects Buildings
Level 15
+100 Attack Range
+6 Corrosive Skin Stats
Level 10
+20 Attack Speed
8% Spell Lifesteal