Narsis

Narsis is a fortress world brought into Imperial compliance by the Emperor’s Children, who raised there the Perfect Fortress, a stronghold guarding nearby forge worlds and holding the loyalist bastions of Agrapha, Chopix and Spartus under constant threat. During the Horus Heresy the world was seized for the Warmaster, becoming a linchpin of the Traitor presence in the southern Imperium. Accounts locate it in the sector around Deliverance, and it is accordingly placed in the Forsarr Sector, though its exact position is uncertain. It was retaken by Corax’s Raven Guard, together with the Therion Cohort, in the Breaking of the Perfect Fortress, in 008.M31.