Leyline of Black Magery

If Leyline of Black Magery is in your opening
hand, you may begin the game with it on the battlefield.
Players cannot gain life.
Whenever you cast a spell you may pay up to {x} where {x} is the number of wizards you control.
If you do, Leyline of Black Magery deals {x}
damage divided among target creatures or players
as you choose.