name: Unstable Mutation
printings: 3ED, 4BB, 4ED, 5ED, ARN, FBB, SUM, TSB, UMA
text: Enchant creature\nEnchanted creature gets +3/+3.\nAt the beginning of the upkeep of enchanted creature's controller, put a -1/-1 counter on that creature.
type: Enchantment — Aura