The infernal duke Sabnach is lord of the Phlegethonian fortress known as the Prototypes. There, he and his 50 legions of hamatulas create foul devices not out of iron and fire but from the souls of the damned. These writhing constructs, be they vehicles, traps, weapons, or even entire fortresses, are then released from the warehouse to spread their misery along the slopes of Phlegethon.1
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- Sabnock (real-world demon) on Wikipedia