Marcius, Returnal Extractor

Flying, deathtouch, devour 3 (As this enters, you may sacrifice any number of creatures. This creature enters with triple that many +1/+1 counter on it.)

during your turn, you may cast creature spells you own from exile.

At the beginning of combat up to two target creatures you control get +2/-1 for each creatures you own in exile.

When a creature you control is put in to your graveyard from the battlefield, put it into exile instead.