Buy @ TCGplayer
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.
If a spell targets you and/or a permanent you control multiple times, or if a spell targets you and one or more permanents you control, Leyline of Combustion’s triggered ability triggers once.
Leyline of Combustion’s triggered ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
