black pudding

enchant attacking or bocking creature
flash
at the beggining of enchanted creature's
controlers upkeep ennchanted creature gets
enchanted creature a -0/-1 counter
if enchanted creature dies you may pay {3}{b} to
return black pudding to your hand
"These creatures were mindless underground-dwelling hunters and scavengers that wandered and absorbed whatever they found. A black pudding would position itself in a dungeon hallway like a shadow and wait for unsuspecting prey." -the dnd wiki