Gnarlback Rhino 
Creature — Rhino
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Whenever you cast a spell that targets this creature, draw a card.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL