Leyline of Rebellion

If this card is in your opening hand, you may
begin the game with it on the battlefield.
When Leyline of Rebellion enters the battlefield,
it deals 4 damage to each player.
{1}{r}{r}: Leyline of Rebellion deals 1 damage to
each player for each time you've cast your
commander from the command zone, then
sacrifice Leyline of Rebellion.