Marrow Chomper 
Creature — Zombie Lizard
Devour 2 (As this creature enters, you may sacrifice any number of creatures. It enters with twice that many +1/+1 counters on it.) When this creature enters, you gain 2 life for each creature it devoured.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL