Beneath their armored skin, their bones and muscular structures appear to be made of magma, like armored Arch-viles, and a fiery blade protrudes from just above the wrist of each arm.
The race of Fireborne Barons, almost identical to snoutless Barons but with a grey, inorganic, magma-infused body, are native to the deeper levels of Hell, where the incendiary matter of Hell fused with them. Barons are also described as being the highest in the order of Hell Knights, implying a direct relation between the species.
In addition, they lack snouts, with a bony face that appears to better resemble that of the Hell Knights, with small eyes and no visible nose. What appears to be a subspecies of the Barons of Hell, or possibly an evolved form of the original Barons, is considerably larger, and while original, satyr-like Barons appeared to only bear ordinary skin, these Barons bear what appears to be natural armor over their upper torsos, with the same color as their skin. Barons of Hell are capable of creating and throwing green fireballs, and have bodies that are extremely resilient to various forms of damage. The appearance of the Baron of Hell consists of a reddish-pink complexion, muscular, hairy goat-like legs ending in hooved feet, a muscular upper body, a goat-like snout, and two black outward curving horns located on the sides of its head.