Xander's Pact is a rare Sorcery card from New Capenna Commander Promos (PNCC), collector number 43p. Current market price: — (foil $1.70), TCGplayer market prices via Scryfall.
Casualty 2 (As you cast this spell, you may sacrifice a creature with power 2 or greater. When you do, copy this spell.) Each opponent exiles the top card of their library. You may cast spells from among those cards this turn. If you cast a spell this way, pay life equal to that spell's mana value rather than pay its mana cost.