Ohmn-Mat

Ohmn-Mat is a former vassal Forge World of the ancient Mechanicum that was destroyed during the Horus Heresy, when the planet was consumed by civil war. Reduced to a cinder, the fires of Ohmn-Mat continue to rage to the present day.

History
The early history of this obscure forge world has been lost down the long millennia. More than likely, this world was discovered and colonised by early Mechanicum Explorators during the Dark Age of Technology or millennia later during the Great Crusade era. With the outbreak of the galaxy-wide conflict known as the Horus Heresy, the forge world of Ohmn-Mat fell into a state of civil war as its Synod of Magos are split in their support for Loyalist and Traitor causes, drawing in contingents of the Sons of Horus Dark Compliance forces and Iron Hands Isstvan survivors as the conflict escalates. In circumstances which remain unknown, the planet's atmosphere is somehow ignited, shrouding the world in fire. Secondary atomantic explosions ravage the surface as forge-fanes across the world succumb and fuel the flames. Ohmn-Mat is destroyed and its fires still rage till the present.