Chronostatic Charge

Chronostatic Charge deals 3 damage to target creature an opponent controls. If four or more creatures are dealt damage this way, take an extra turn after this one. If this spell was overloaded, exile it.
Overload {5}{u}{r} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of 'target' with 'each'.)