Dark Mechanicum
The Dark Mechanicum, also sometimes referred to incorrectly as the Dark Mechanicus, and who refer to themselves as the “New Mechanicum,” is a sect of traitorous Tech-priests, members of the Collegia Titanica and Chaos Knights of the ancient Mechanicum who have become Hereteks in service to Chaos. They willingly swore their loyalty to the Warmaster Horus and the Chaos Gods as the Great Crusade came to a close and the terrible galactic conflict known as the Horus Heresy erupted in the early 31st Millennium.