Coral Trickster (DDN) from Duel Decks: Speed vs. Cunning, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: D. Alexander Gregory
• Card Text:
  Morph U (You may play this face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.)
  When Coral Trickster is turned face up, you may tap or untap target permanent.