Whetwheel (FUT) from Future Sight, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Cyril Van Der Haegen
• Card Text:
  XX, T: Target player puts the top X cards of his or her library into his or her graveyard.
  Morph 3 (You may play this face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.)