Volley Spell

You weave a ward of protection about one willing creature. That creature gains the ability to use its reaction to turn one spell that allows a saving throw back at the spell’s caster.

The target of the reflected spell makes a saving throw against it. If the save is successful, the spell rebounds again, back to the original target. That creature then makes its own saving throw, and if successful, the spell rebounds again. The spell continues to rebound between the original caster and the original target until one or the other fails its saving throw; at that point, the spell takes full effect and stops rebounding. If this hasn’t happened by the time six saving throws have been made (three from each target), the spell dissipates harmlessly.

In the case of an area effect spell, only that portion of the spell that would affect the warded creature is volleyed; the rest of it goes off and affects other creatures in the original target area as normal. If several creatures in the area of effect are warded by this spell, the original caster could take the effect of the spell several times over!