Bident of Thassa is a rare Legendary Enchantment Artifact card from Theros Promos (PTHS), collector number 42★. Current market price: — (foil $1.26), TCGplayer market prices via Scryfall.
Whenever a creature you control deals combat damage to a player, you may draw a card. {1}{U}, {T}: Creatures your opponents control attack this turn if able.