An Empire founded by Arkat after Nysalor's death (circa 450 ST).
- Known as the Dark Empire, Stygian Alliance or the Stygian Empire by its enemies.
- Its capital was Arkhome, now in Arolanit.
- It was destroyed by the God Learners.
- Its records were destroyed.
- Its revival is the earnest dream of many in Safelster, but they are always in internal conflict about the "right" form of the Autarchy.
Sources: Guide to Glorantha