Sedh

Sedh is a frozen, polluted Necron frontier world of the Ithakas Dynasty, used as a place of exile for disgraced dynasts under Lord Oltyx. It is the world of Oltyx, known as the Twice-Dead King, and belongs to the Ultima Segmentum. It is not an Imperial agri-world of similar name.

Oltyx killed an Ork warboss on Sedh before it was acknowledged that the Orks had been fleeing an Imperial crusade. The Necron garrison then evacuated toward the crownworld Antikef. This left Sedh a ruined and frozen world, occupied by failed nobles and residual spore.

Sedh remains notable as the posting to which Oltyx was sent in disgrace. It should be distinguished from Ithaka, the homeworld of the Iron Snakes Space Marines, and from Antikef, the throneworld of the Ithakas Dynasty.