Share the Spoils is a rare Enchantment card from Forgotten Realms Commander (AFC), collector number 303. Current market price: $3.86, TCGplayer market prices via Scryfall.
When this enchantment enters and whenever an opponent loses the game, exile the top card of each player's library. During each player's turn, that player may play a land or cast a spell from among cards exiled with this enchantment, and they may spend mana as though it were mana of any color to cast that spell. When they do, exile the top card of their library.