(Innate): Each of Warwick's autoattacks deals 3 / 3.5 / 4 / 4.5 / 5 / 5.5 / 6 / 6.5 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 / 16 additional magic damage and heals him for the same amount. Each successive attack against the same target will stack this amount of healing and damage up to a maximum of 3 stacks (9-48 magic damage). The stacks remain for 4 seconds.
Eternal Thirst is a passive ability that grants Warwick an on-hit effect, dealing additional magic damage on each autoattack and healing Warwick for the same amount. Subsequent applications on the same target unit will stack the damage and healing effect up to 3 times.
The healing portion is independent from the damage portion of the ability, meaning the heal is always the same regardless of the damage dealt to the target (e.g. magic resistance's damage reduction).
Disregarding bonus Attack Damage, Eternal Thirst is an equivalent of ~ 5% / 10% / 15% Lifesteal at level 1 to ~ 14% / 27% / 41% Lifesteal at level 18.
(Active): Strikes an enemy for the greater value between the flat magic damage and a percentage of the target's maximum health, and heals Warwick for 80% of the magic damage dealt. Monsters will only be dealt the flat magic damage.
Health to Magic Damage Ratio: % / 8 / 10 / 12 / 14 / 16 (+1 per ability power).
Hungering Strike is a targeted ability that deals magic damage to a target enemy unit. The damage dealt is the greater value between a percentage of the target's maximum health plus a flat amount equal to Warwick's ability power, and a flat amount plus Warwick's ability power. Warwick is also healed for 80% of the damage dealt to the target.
Hungering Strike procs spell vamp and Rylai's slow similarly with all single target spells and abilities with full effect.
Hungering Strike will damage Black Shield but Warwick is still healed.
The point of health where the base damage is equal to the percentage equivalent at each level for Hungering Strike is 938 / 1250 / 1458 / 1607 / 1719 health. (this cannot be selected but is readily available based on the above table)
Note: Among the abilites that deal damage acording to a percentage of the opponent's health Hungering Strike is the only one with a modifier (ability power or attack damage) ratio that gives flat damage, instead of incresing the modifier of the skill (in this case % of health of the target).
In short, the AP ratio modifer adds flat damage regardless of which damage modifer is used - Flat damage or the % of health of the champion.
Warwick lets out a howl that inspires all allied champions, increasing Warwick's attack speed and all friendly champions' attack speed by half of the amount for 10 seconds.
Cost: 35 mana.
Cooldown: 24 / 22 / 20 / 18 / 16 seconds.
Attack Speed: 40 / 50 / 60 / 70 / 80 %.
Hunters Call is a point blank area of effect ability that grants Warwick and nearby allied champions increased attack speed for a short duration.
Hunters Call has no cast time and does not interrupt Warwick's previous orders.
(Toggle): Warwick senses enemy champions under 50% life within a certain distance of him. Upon sensing an enemy, he will gain extra movement speed.
Cooldown: 4 seconds.
Distance: 1.500 / 2.300 / 3.100 / 3.900 / 4.700 .
Movement Speed: 20 / 25 / 30 / 35 / 40 %.
Blood Scent is a toggled ability. While toggled on, Blood Scent will activate when an enemy champion whose current health is under 50% of his maximum health moves into a radius around Warwick, giving Warwick bonus movement speed and granting Warwick and his allies vision of the champion while they remain in range.
Upon sensing an enemy, that enemy will become visible to Warwick and his allies, even in fog of war or inside a bush.
Stealthed units will not be revealed even if they are sensed by Warwick. He will still gain the movespeed bonus, but he will not be able to see the unit.
(Active): Warwick lunges at an enemy champion and suppresses them for 1.8 seconds. During this time, Warwick attacks his victim 5 times, dealing a total of 250/335/420 (+2.0 Bonus AD) magic damage (triggers on-hit effects 5 times). Warwick gains 30% Life Steal for the duration and benefits from full stacks of Eternal Thirst.
Cost: 100 / 125 / 150 mana.
Cooldown: 90 / 80 / 70 seconds.
Extra Damage: 50 / 67 / 84 .
Infinite Duress is a targeted channeled blink ability that moves Warwick to a target enemy champion's location and initiates a 1.8 second channel, during which the target unit is suppressed. While channeling, every 0.36 seconds Warwick strikes his target for magic damage, and heals for 30% of the damage dealt.
The lifesteal from Infinite Duress affects magic damage on-hit effect items such as Nashor's Tooth or Wit's End, unlike normal lifesteal. It is uncertain whether additional lifesteal stacks and works alike with the 30% lifesteal from this ability.
As it hits five times, wielding the item Nashor's Tooth will give the ability a 0.75 ability power ratio
Can be increased by the Spellsword mastery to a 1.0 AP ratio.
None of Infinite Duress's attacks can critically strike.
Whilst suppressing his target, Warwick is considered to have full stacks on Eternal Thirst (this is regardless of how many he had prior). Including this damage, Infinite Duress will deal 332.5 / 340 / 347.5 / 355 / 370 / 470 / 485 / 500 / 515 / 530 / 630 / 645 / 660 (+2.0 per bonus attack damage) magic damage. This is assuming you take ranks in Infinite Duress at level 6, 11 and 16.
If Warwick is blinded before casting Infinite Duress, all of his strikes will miss.
All the blows have the potential to proc and apply Lich Bane, Sheen, Trinity Force and the Iceborn Gauntlet but will only hit once because of the internal cooldown of this items, anyways, he will be able to get the proc right after finishing the channel which last for 1.8 seconds , in contrast to the 2 second cooldown of the items.