Devastation's Call

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Devastation's Call deals 4 damage to target creature an opponent controls.
Overload {4}{u}{u}{r}{r} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of 'target' with 'each'.)
As you cast this spell, if there are 10 or more instant cards in your graveyard, copy this spell twice. You may choose new targets for