Perplexing Chimera is a rare Enchantment Creature — Chimera card from Born of the Gods (BNG), collector number 48. Current market price: $1.51 (foil $9.75), TCGplayer market prices via Scryfall.
Whenever an opponent casts a spell, you may exchange control of this creature and that spell. If you do, you may choose new targets for the spell. (If the spell becomes a permanent, you control that permanent.)