Kor'agar is the manifestation of a towering, rage filled behemoth. As a living embodiment of war, the Tanar'ri is adorned in ancient, ornamented armor festooned with archaic symbols and wards to protect him from those who would dare attempt to engage him with ranged weaponry.

His skin is the deep red of encrusted blood, and his gore-flecked hide is all iron and sinew. His impossibly muscled body is littered in places with tiny iron-tipped barbs, and from his back sprout a pair of gigantic, membranous, bat-like wings, enabling him to soar over the battlefield before diving into the fiercest and bloodiest areas of battle, striking at will.

As well as razor-sharp claws, the demon is known to wield a massive great blade, a great relic forged in the heat of rage and imbued with the essence of other caged fiends he has bested in battle. In the past 5,000 years, Kor'agar has only been summoned forth from the abyss on three occasions.

Those that attempt to summon him must have first pleased him with their devotion to war and their ability to crush and conquer their foes. Few would dare attempt it, and fewer still have been successful in gaining the demon's allegiance.