Free-for-All is a rare Enchantment card from Unglued (UGL), collector number 25. Current market price: $2.31, TCGplayer market prices via Scryfall.
When this enchantment enters, exile all creatures face down. At the beginning of each player's upkeep, that player chooses a card exiled with this enchantment at random and puts it onto the battlefield. When this enchantment leaves the battlefield, put all cards exiled with it into their owners' graveyards.