Siege Smash is a common Instant card from Modern Horizons 3 (MH3), collector number 136. Current market price: $0.26 (foil $0.33), TCGplayer market prices via Scryfall.
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.) Choose one — • Destroy target artifact. • Target creature gets +3/+2 and gains trample until end of turn.