Harkon, Ancient Vampire Lord

Flying, lifelink
When Harkon, Lord of Volkihar mutates into Harkon, Ancient Vampire Lord. Return up to one target creature from graveyard
When Harkon, Ancient Vampire Lord enters the battlefield or attacks. Choose one of the following
• Exile target creature until end of next turn.
• Pay life equal to power + toughness of creature in opponents graveyard and put it into your control tapped.