Leyline of the Void is a rare Enchantment card from Duskmourn: House of Horror Promos (PDSK), collector number 106s. Current market price: — (foil $1.01), TCGplayer market prices via Scryfall.
If this card is in your opening hand, you may begin the game with it on the battlefield. If a card would be put into an opponent's graveyard from anywhere, exile it instead.