Marik, Star-Eyed Child

Flash
When Marik enters the battlefield permanents
you control gain hexproof until end of turn.
If a permanent would leave the battlefield exile it instead. When 5 or more permanents are exiled
this way, exile Marik, then return him
transformed and each permanent exiled to the battlefield under your control.
{u}{b}: Target creature gains deathtouch and flying
until end of turn.