Osai Vultures 
Creature — Bird
Flying At the beginning of each end step, if a creature died this turn, put a carrion counter on this creature. Remove two carrion counters from this creature: This creature gets +1/+1 until end of turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL