Ch. 121Mortarion's Humiliation
Guilliman sent Sanguinius, Horus, Liang Bing, and Pandora to investigate the missing fleet in the Nephilim Sector, where evidence pointed to a hostile Necron dynasty. Before the Apocalypse departed, Sanguinius and Horus witnessed Mortarion being brutally tortured during a purification experiment and left without speaking to him.
- Guilliman received an indecipherable distress message from the missing Unyielding Will fleet, and Luke, Sanguinius, and Horus identified its energy as belonging to a chaotic Necron force distinct from the Silent King.
- Guilliman assigned Sanguinius, Horus, Liang Bing, and Pandora to investigate the Nephilim Sector while he and the others continued the plan to travel to Mars.
- Liang Bing used her Mind Cube and teleported the group to the Apocalypse near The Rock.
- Sanguinius and Horus saw Mortarion restrained in a laboratory while a Greater Daemon of Khorne sprayed him with purifying liquid and struck him when he struggled.
- The Greater Daemon used a charged device on Mortarion, leaving him collapsed and sobbing, while Sanguinius and Horus watched in shock.
- Sanguinius and Horus declined to speak with Mortarion, then left the observation area as the Apocalypse set course for the Nephilim Sector.