Originally Posted by fallenwarrior
It depends on how the breath weapon is being recharged. If the character is using the Ancient Soul + Nusemnee's Atonement combo, then the hit is on an ally. You could go with a bag of rats ruling on that, but to be consistent you'd need to apply that rule every time friendly fire occurs.
On the other hand, my proposed house rule covers the situation without needing to do that.
That would be a definite Bag of Rats instance, and I don't see the problem/flaw with the rule when consistently applied since it's specifically orientated for abusive situations where you derive a benefit from attacking an ally (or other nonthreatening target) and covers these contingencies well. Of course, there are exceptions where you are explicitly and obviously meant to gain a benefit from targeting/hitting an ally, Coordinated Explosion being one; in these cases it doesn't apply.