Stats

Armor, magic resist, mana and attack speed are the same at every star level.

Warwick

1 star: Gain ? Attack Speed, 40% Lifesteal, and increased movement speed for the rest of combat. While in this state, if a takedown is scored, howl to grant all allies who share a Trait an additional 60% Attack Speed for 3 seconds. ?
2 star: Gain ? Attack Speed, 40% Lifesteal, and increased movement speed for the rest of combat. While in this state, if a takedown is scored, howl to grant all allies who share a Trait an additional 75% Attack Speed for 3 seconds. ?
3 star: Gain ? Attack Speed, 200% Lifesteal, and increased movement speed for the rest of combat. While in this state, if a takedown is scored, howl to grant all allies who share a Trait an additional 200% Attack Speed for 3 seconds. ?

3 patches changed Warwick, read out of Riot’s game files.

Patch 10.25Dec 2020
- Lifesteal percent50 / 50 / 20040 / 40 / 2001★ / 2★ / 3★
Patch 10.24Nov 2020
- Attack damage7085
- Attack speed0.90.8
- Primal Hunger rewritten
  Before
  Warwick gains ? Attack Speed, 50% Lifesteal, and moves faster for the rest of combat. While in this state, if Warwick scores a takedown he howls, stunning all adjacent enemies for 0.75 seconds.
  After
  Warwick gains ? Attack Speed, 50% Lifesteal, and moves faster for the rest of combat. While in this state, if Warwick scores a takedown he howls, granting himself and all allies who share a Trait with him an additional 75% Attack Speed for 3 seconds.
Patch 10.23Nov 2020
- Attack speed percent1.75 / 2 / 51.35 / 1.5 / 51★ / 2★ / 3★
- Fear duration1.5 / 1.5 / 30.75 / 0.75 / 31★ / 2★ / 3★