Inferno Trap is a uncommon Instant — Trap card from Duel Decks: Speed vs. Cunning (DDN), collector number 67. Current market price: $0.03, TCGplayer market prices via Scryfall.
If you've been dealt damage by two or more creatures this turn, you may pay {R} rather than pay this spell's mana cost. Inferno Trap deals 4 damage to target creature.