Fists of Flame is a common Instant card from Commander Masters (CMM), collector number 223. Current market price: $0.32 (foil $0.38), TCGplayer market prices via Scryfall.
Draw a card. Until end of turn, target creature gains trample and gets +1/+0 for each card you've drawn this turn. (A creature with trample can deal excess combat damage to the player or planeswalker it's attacking.)