Oryx, the Taken King

Flying, indestructible, lifelink

Whenever a creature is put into a graveyard, exile it instead and put a Taken counter on it. You may look at
and play these cards for as long as they remain exiled this way, and you may spend mana as though it were mana of any color to cast these spells. It becomes a colorless Taken
in addition to its other types. If this creature would die, exile it instead.

{t}, {w}{b}{g}: Destroy target creature. It can't be regenerated.