Regulus (Dark Mechanicum)
Regulus was the Adeptus Mechanicus representative to Warmaster Horus and the 63rd Expedition during the Great Crusade. He joined forces with Horus and assisted in swaying the Fabricator-General to the side of the traitors and was instrumental in initiating the Schism of Mars.
- 1: Horus Rising (Novel) by Dan Abnett, Chapter Six, pg. 114
- 2: Mechanicum (Novel) by Graham McNeill, [Needs Citation]