Nessian Warhounds are massive, coal-black mastiffs the size of large draft horses, exuding an aura of menace and power. These fiendish creatures are often seen wearing shirts of fire-scorched barding, emphasizing their infernal nature. Their ebony fur contrasts starkly with their burning, fiery red eyes, making them a terrifying sight.

Inhabiting the Nine Hells, particularly the layer of Nessus, Nessian Warhounds serve as loyal guardians and hunters for powerful infernal beings, including archdevils like Asmodeus. Their bite not only inflicts severe physical damage but also burns with intense fire. They can exhale a devastating cone of fire, making them formidable in battle.