Panic Spellbomb (CM2) from Commander Anthology Volume II, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Franz Vohwinkel
• Card Text:
  T, Sacrifice Panic Spellbomb: Target creature can't block this turn.
  When Panic Spellbomb is put into a graveyard from the battlefield, you may pay R. If you do, draw a card.