Skeleton Scavengers 
Creature — Skeleton
This creature enters with a +1/+1 counter on it.
Pay 
for each +1/+1 counter on this creature: Regenerate this creature. When it regenerates this way, put a +1/+1 counter on it.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL