Strange Inversion is a uncommon Instant — Arcane card from Champions of Kamigawa (CHK), collector number 192. Current market price: $0.22 (foil $0.41), TCGplayer market prices via Scryfall.
Switch target creature's power and toughness until end of turn. Splice onto Arcane {1}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)