Shaper Parasite is a common Creature — Illusion card from The List (PLST), collector number C14-125. Current market price: $0.28, TCGplayer market prices via Scryfall.
Morph {2}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, target creature gets +2/-2 or -2/+2 until end of turn.