This story is a sequel to Iris Rising: Dreamfall (retcon planned)

Picking up where Dreamfall left off, Iris Dashiell gets separated from the rest of the Godslayers and winds up in Crystal Empire, one of two powerful nations in Moebius. There she meets a pony-people version of herself, the only known Pegasus with magic abilities. Together, they set out on a journey to seek out a magic artifact that might be able to save (or not) Moebius from Sinned Godus' latest war machine, the Monster.

(Universes: Mobius, Moebius Equestria & Earth Equestria)