Fiery Gambit is a rare Sorcery card from Mirrodin (MRD), collector number 90. Current market price: $3.40 (foil $5.57), TCGplayer market prices via Scryfall.
Flip a coin until you lose a flip or choose to stop flipping. If you lose a flip, Fiery Gambit has no effect. If you win one or more flips, Fiery Gambit deals 3 damage to target creature. If you win two or more flips, Fiery Gambit deals 6 damage to each opponent. If you win three or more flips, draw nine cards and untap all lands you control.