Crazed Firecat 
Creature — Elemental Cat
When this creature enters, flip a coin until you lose a flip. Put a +1/+1 counter on this creature for each flip you won.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL