Well there it is, finally!
I didn't know where and how to end it, as I'm sure if someone else attacks it and knocks it about in enough distraction, that it wouldn't have time to build up the Pestilent Breath? If I'm wrong in this, I can edit it in, but then I wanted to sort of give everyone a chance to respond and prepare.
I referred to the combat guidelines often, so I assume that the spirit attack would prioritize and neutralize the threat against it.