Arken, World Keeper

Fliying, Vigilance
Whenever a creature with defender enters the
battlefield under your control, you may gain 2 life.
Whenever a creature enters the battlefield under
an opponent's control, you may have that player
lose 1 life.
Each creature you control with defender assigns
combat damage equal to its toughness rather than
its power and can attack as though it didn't have defender.