Lilith, Golden God of Clemency

Ward—Exile a creature you control, pay 3 life.
As long as your devotion to white is less than
seven, Lilith isn't a creature.
Creatures you control get +0/+2 and enter the
battlefield with your choice of a lifelink counter
or a vigilance counter. At the beginning of
combat on each player's turn, you may exile up
to one target permanent, then return it to the
battlefield under its owner's control.