Phalanx

The Soul Drinkers have been captured by the Imperial Fists, who intend to see them put on trial on the Phalanx, the Fists' vast space fortress. Inside, one of Iktinos’ faithful breaks under interrogation and reveals the location of a vault hidden under Selaaca.

An Imperial Fists squad opens up an ancient vault below the planet's surface. Inside the vault is Daenyathos, kept alive in his dreadnought body. He is brought back to the Phalanx to face trial with the rest of the Soul Drinkers.