Crumbling Colossus (M12) from Magic 2012, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Michael C. Hayes
• Card Text:
  Trample (If this creature would assign enough damage to its blockers to destroy them, you may have it assign the rest of its damage to defending player or planeswalker.)
  When Crumbling Colossus attacks, sacrifice it at end of combat.