Scorching Lava is a common Instant card from Invasion (INV), collector number 164. Current market price: $0.20 (foil $0.54), TCGplayer market prices via Scryfall.
Kicker {R} (You may pay an additional {R} as you cast this spell.) Scorching Lava deals 2 damage to any target. If this spell was kicked, that creature can't be regenerated this turn and if it would die this turn, exile it instead.