Stats

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

Warwick

1 star: PASSIVE: Warwick gains 0.2 Omnivamp. Upon his first takedown, he enters KILL MODE 2.0, granting himself 60% Attack Speed and causing him to leap to new targets for the rest of combat. ACTIVE: Warwick attacks his target 6 times, dealing a total of ? physical damage. (500% Attack Damage). If his target dies he gains 10 mana for each remaining slash.
2 star: PASSIVE: Warwick gains 0.2 Omnivamp. Upon his first takedown, he enters KILL MODE 2.0, granting himself 60% Attack Speed and causing him to leap to new targets for the rest of combat. ACTIVE: Warwick attacks his target 6 times, dealing a total of ? physical damage. (500% Attack Damage). If his target dies he gains 10 mana for each remaining slash.
3 star: PASSIVE: Warwick gains 0.5 Omnivamp. Upon his first takedown, he enters KILL MODE 2.0, granting himself 60% Attack Speed and causing him to leap to new targets for the rest of combat. ACTIVE: Warwick attacks his target 6 times, dealing a total of ? physical damage. (1500% Attack Damage). If his target dies he gains 10 mana for each remaining slash.