Leyline of the Void is a rare Enchantment card from Guildpact (GPT), collector number 52. Current market price: $4.29 (foil $40.25), 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.