Oath of Jace is a rare Legendary Enchantment card from Oath of the Gatewatch Promos (POGW), collector number 60s. Current market price: — (foil $1.73), TCGplayer market prices via Scryfall.
When Oath of Jace enters, draw three cards, then discard two cards. At the beginning of your upkeep, scry X, where X is the number of planeswalkers you control.