As the Matron, Tierak, Kilcif and others retreat out of the audience hall to join the fight in the hallway against the invisible spellcaster.
Dariel has moved up to flank the spellcaster against the surviving Aranea and the Bebilith. The combat is taking place in the guardroom to the east of the entrance to the audience hall.
The Bebilith pins the spellcaster in its claws and begins to tear at the trapped spellcaster.
Then the Bebilith suddenly can snaps its claws furiously, completely closed and open, as if the trapped prey somehow escaped.
The Bebilith heads off down the south east hallway, as if in pursuit of some opponent you can not see or hear.