Dragonlord Lavahryn

Flying, lifelink
Whenever Dragonlord Lavahryn enters the
battlefield or deals combat damage to a player,
if you gained 4 or more life this turn, exile target
creature an opponent controls until Dragonlord
Lavahryn leaves the battlefield.
{4}{w}{b}, {t}, Pay 6 life: Put target creature exiled
with Dragonlord Lavarhyn onto the battlefield
under your control.