Invert Polarity is a rare Instant card from Modern Horizons 3 (MH3), collector number 459. Current market price: $1.18 (foil $2.56), TCGplayer market prices via Scryfall.
Choose target spell, then flip a coin. If you win the flip, gain control of that spell and you may choose new targets for it. If you lose the flip, counter that spell.