She loses her grip under the rock, and falls into the blackness below that is all that remains of her god.
And as her mortal body hits the rock her consciousness reaches out from it in all directions, searching, flailing out for the nearest host.
And she finds one, one that fits, one that she has been shaping for such a necessity for three hundred years, and clings to it with all her ability. She can sustain its life for a little longer, and hopefully someone will come for it. She can fool the roommate, then, into recreating her empire.