Editing Behemoth Guard (section)

==Homeworld==
Gengrat was found 40 years into the crusade on Terrodyne, a world bathed in the light of the Eye of Terror. His homeworld was a mist-shrouded waste, inhabited by great beasts. The Industrial Combine which ruled the planet had industrial era technology, as if WWI era Europe was taking on Godzilla on a regular basis. A high rate of mutation on the world resulted in a high ab-human population used for menial labor and bait. Gengrat was raised in his youth in the deep swamp wastes by an abhuman witch named Grenwyth. Grenwyth lived in an iron hut, and on her shelves and walls were many tools of unknowable use. Gengrat's pod had been pierced by a tree, and his brain had been pierced by a branch. Grenwyth crafted for Gengrat an implant, using an ancient relic her family had kept for centuries. That relic was in fact a datastore, which stored within it thousands of machine spirits, tainted by centuries of degradation.. These spirits would whisper into Gengrat's mind for the rest of his days. Grenwyth taught Gengrat many of her technosorcerous arts, and of the great god Tzeentch who could make one's wishes reality. Gengrat used the powers he had learned from his foster mother to terrorize the outer wastes. Voices in his head told him which way to go through the mists. One day the voices lead Gengrat to the gates of the city, and demanded entrance. He ensorceled the minds of the city watch, and they escorted him to the Combine's council chambers. There he slew every one of the technocratic rulers, and claimed the planet as his own. When the Emperor discovered the planet, Gengrat merely left his throne empty and marched off with his father, not sparing a thought for the fate of his homeworld. For many years the Imperial Truth convinced Gengrat that Grenwyths teachings had been superstitious nonsense. However, always in the back of his head the voices called.

His legion had been outriders. He taught them to listen to the voices in the engine manifolds.
In the end, it was these voices that taught them the secrets of the imaterium.