A Half-Fiend Durzagon in Dungeons & Dragons is a fearsome hybrid of duergar (dark dwarves) and fiendish lineage. These creatures possess the innate cruelty and cunning of their duergar heritage, combined with the infernal powers of their fiendish ancestry. Standing slightly taller than typical duergar, they have dark, ash-gray skin, glowing red eyes, and often sport small horns or bat-like wings.

Half-Fiend Durzagon possess powerful abilities, including darkvision, innate spellcasting, and resistance to fire and poison. They can unleash devastating spells and summon fiendish allies. These beings are often found as leaders or enforcers in dark dwarven societies, embodying the worst traits of both lineages.