Leyline of Combustion [Core Set 2020 Prerelease Promos]Set: Core Set 2020 Prerelease Promos Type: Enchantment Rarity: Rare Cost: {2}{R}{R} If Leyline of Combustion is in your opening hand, you may begin the game with it on the battlefield. Whenever you and or at least one permanent you control becomes the target of a spell or ability an opponent controls, Leyline of Combustion deals 2 damage to that player.