Lethargy Trap (Foil) (ZEN) from Zendikar, available at 401 Games Canada.

• Rarity: Common
• Finish: Foil
• Artist: Anthony Francisco
• Card Text:
  If three or more creatures are attacking, you may pay U rather than pay Lethargy Trap's mana cost.
  Attacking creatures get -3/-0 until end of turn.