The Hounds of Tartarus are a stoic and disciplined successor of the Iron Warriors, forged during the Ultima Founding to master siege warfare in loyal service to the Imperium.

Clad in Gravis armor and steeped in martial tradition, they strike with overwhelming force and unshakable resolve.

Now guardians of a forge world’s darkest vaults, they fight not just as warriors, but as sentinels—unyielding defenders at the threshold of humanity’s most dangerous secrets.