I tend to disagree a lil here. Aerop-Enap who was capable to catch Morrigan, shows to be stronger as her. He is capable to re-erect the same words of power that kept him from breaking out, to keep The Morrigan in that cell. If that is happening, he only needs to instruct Perry, as the glyph/word of power does not hurt as long as it is not directly pointed towards his vision.
It also kept de Ayala away from entering, so the "evil" creatures will if this happens not be able to help her, as the effect it has on de Ayala will also affect them. So it might free Perry as the other creatures will indeed either fight amongst there natural enemies, or fight someone else and thus also be too busy focussing on the Morrigan. However it might be interesting to see whether or not Bastet comes to her help.
And then again, will Romulus who killed Remus (according to Mars Ultor) come into play ????
Eye of Ra