Hold the Big Bang

This spell can't be countered, copied, or cast from
anywhere other than your hand.

Permanents your opponents control lose
indestructible and can't have or gain indestructible
until end of turn. Your opponents can't gain life this
turn. Damage can't be prevented this turn. Deal X
damage to each opponent and each permanent your
opponents control, where X is the number of
permanents on the battlefield, then exile Hold the
Big Bang.