Jergal Zadh was a powerful yet ultimately exiled elder-god who acted as one of Conan's many adversaries during the barbarian's colorful adventures in the Marvel universe - Jergal was the ruler of his own dimension and even had his own impressive horde of lesser demons by which to oppose even the famous hero.

Like many demons and dark gods Jergal Zadh was a malevolent being who sought conquest and delighted in his evil deeds - being a manifestation of evil he did not require human traits and thus can be considered an example of a traditional "Dark Lord", devoid of any positive traits and existing purely to sow misery upon his setting.