Aquamorph Entity (PLC) from Planar Chaos, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Brian Despain
• Card Text:
  As Aquamorph Entity comes into play or is turned face up, it becomes your choice of 5/1 or 1/5.
  Morph 2U (You may play this face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.)