Proteus Machine (SCG) from Scourge, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Greg Staples
• Card Text:
  Morph 0 (You may play this face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.)
  When Proteus Machine is turned face up, its type becomes the creature type of your choice. (This effect doesn't end at end of turn.)