User blog comment:Njalm2/Direction of the Coven/@comment-18812574-20161201182409/@comment-24384232-20161202030653

Hmm if possible I'd also try and have The Coven co-op travel between Soul Society and the Human World. Best scenario would be to screw with the mechanism by which they travel there, by using magic that confuses the Hell Butterflies, thereby either trapping or significantly delaying Shinigami forces from arriving in areas. That or scramble their system by which they can lock in coordinates to where they wish to end up.

I'd have it so that if a Shinigami wants to enter the fray in time, they'd have to first open up a gateway to Hueco Mundo, and then go to the Human World from there thereby pitting the remnant Arrancar and Shinigami forces against one another. Then if there are individual Hollows/Arrancar who do aid the Shinigami, The Coven can mark them as priority targets and kill them, to really screw them over.