Leyline of the Void is a rare Enchantment card from Core Set 2020 (M20), collector number 107. Current market price: $0.80 (foil $1.53), 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.