Altar Golem (EVE) from Eventide, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Rob Alexander
• Card Text:
  Trample
  Altar Golem's power and toughness are each equal to the number of creatures in play.
  Altar Golem doesn't untap during your untap step.
  Tap five untapped creatures you control: Untap Altar Golem.