Lichenthrope 
Creature — Plant Fungus
If damage would be dealt to this creature, put that many -1/-1 counters on it instead. At the beginning of your upkeep, remove a -1/-1 counter from this creature.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL