Flavor Disaster is a rare Enchantment Creature — Elemental Pirate card from Mystery Booster 2 (MB2), collector number 575. Current market price: $0.18, TCGplayer market prices via Scryfall.
Reach When Flavor Disaster enters the battlefield or when it's turned face up, target creature gets +X/+X until end of turn, where X is Flavor Disaster's power. Negamorph {1}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its negamorph cost and put a -1/-1 counter on it.)