Vandrax 3: Cybixx defends Spaceport from Ultramarines strike

Archmagos Dominus Licussian Cybixx had become a key architect of the Crusade following the Noctis Aeterna. Cybixx had joined Vorushko's cause after the events on Corticant opened the Foramen, and now, for reasons as yet generally unknown, he brought his considerable weight in knowledge and Mechanicum forces behind the Crusade. With his small but powerful Mechanicum fleet stationed nearby, Cybixx continued construction of the Space Port on Vandrax 3 while putting in plans to create "further installations" as necessary. 

Inquisitor Hathek, now personally aboard the Sir Gallahad, had the support of the Imperial Fists and Ultramarines chapters, who had been convinced the Mechanicum ad Cybixx at least were up to no good, and should be brought to heel. The Imperial Fists set off for the outermost planet, while the ultramarines prepared a lightning raid against the crusade Space Port to render it ineffective, preparing the way for a loyalist invasion of the world.

The Crusade forces were however ready for this attack, and Cybixx himself personally commanded his forces where the battle was at its most intense. Splitting into two forces the Ultramarines tried a two pronged attack. However on one flank they were fought to a standstill by the Mechanicum, whereas on the other, where Cybixx was involved, the Ultramarines were themselves ambushed and took heavy casualties. The raid on Vandrax 3 was a total failure, and Cybixx continued with his construction, while a badle beaten Ultramarines force returned to the Loyalist fleet.