Passive: Lifesteal - Your attacks heal you for 15% of the damage dealt.
Lifesteal is a Unique Attack Modifier, and does not stack with other Unique Attack Modifiers.
Active: Dominate - Gives you control of a target non-hero enemy unit. The Dominated unit cannot block units, lasts 20 minutes, and is treated as a hero for certain spells. Cannot be used on Ancients.