Shaper Parasite

Creature - Illusion 2/3, 1UU (3)
Morph {2}{U} (You may cast this face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

When Shaper Parasite is turned face up, target creature gets +2/-2 or -2/+2 until end of turn.¹
Illus. rk post

Gatherer Card Rulings [Nov 2009]

• 2/1/2007: You choose whether the targeted creature gets +2/-2 or -2/+2 as the ability resolves.

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (1/9)	Planar Chaos (Common)