Bituminous Blast is a rare Instant card from Magic Player Rewards 2010 (P10), collector number 7. Current market price: $1.76, TCGplayer market prices via Scryfall.
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.) Bituminous Blast deals 4 damage to target creature.