Dan, Shrewd Trader is a rare Legendary Creature — Human Gamer card from Unknown Event (UNK), collector number RB03b. Current market price: $85.00, TCGplayer market prices via Scryfall.
You can bargain any permanent instead of just artifacts, enchantments, and tokens. Whenever you cast a spell, if it was bargained, copy that spell. You may choose new targets for the copy.