Inferno Trap is a uncommon Instant — Trap card from Zendikar (ZEN), collector number 133. Current market price: $0.08 (foil $0.25), 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.