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

• Rarity: Uncommon
• Finish: Normal
• Artist: Franz Vohwinkel
• Card Text:
  If an opponent drew three or more cards this turn, you may pay {R} rather than pay Runeflare Trap's mana cost.
  Runeflare Trap deals damage to target player equal to the number of cards in that player's hand.