Complex sentence: Durka, however, has been mentally "cleansed" by the Nebari and rendered docile and incapable of violent behavior, and the same fate awaits Chiana once back on the Nebari homeworld, a fate she is desperately trying to avoid.
Split into simpler sentences: Durka, however, has been mentally "cleansed" by the Nebari--rendered docile and incapable of violent behavior. The same fate awaits Chiana back on the Nebari homeworld, a fate she is desperately trying to avoid.