Dreadmaw's Ire is a uncommon Instant card from The Lost Caverns of Ixalan (LCI), collector number 147. Current market price: $0.38 (foil $0.50), TCGplayer market prices via Scryfall.
Until end of turn, target attacking creature gets +2/+2 and gains trample and "Whenever this creature deals combat damage to a player, destroy target artifact that player controls."