Orongi the Destroyer

Orongi the Destroyer is a Primordial of Destruction. He is even more powerful than even the most powerful True Demon or even the gods themselves.  Most of the time, Orongi remains immaterial. When he does feel the need to take on a physical form, he is the size of a large titan.  He has blackish-red skin, burning red eyes, massive claws and teeth, huge horns on his head, bat-like wings, and a tail ending in a mass of spikes.  As a Primordial, Orongi the Destroyer is the oldest known being in existence, predating the realms and even the Elder Gods themselves, and a true ancient evil.  As the very incarnation of destruction itself, he is strong enough to actually kill gods and so powerful it took an alliance of the gods and the entire population of Malferno to defeat him.  Even with all of them combined, they were unable to destroy him.  Instead, they trapped him in a prison realm where he remains to this day.  Despite the fact that his return would bring about the end times, Orongi does have a cult that worships him. The goal of this cult is to free their master and unleash him upon existence. These cultists are extremely dangerous and the Order of the Divine Hand moves quickly to put a stop to their activities whenever they pop up. Orongi will return eventually, even without the help of his cult. He is destined to someday escape and return to the realms to destroy them.  Whether or not he succeeds is unclear, but currently there is no known way to destroy him.  And since both Malferno and the gods suffered massive casualties during that battle that neither have fully recovered from, it is unlikely that a renewed alliance will be able to re-imprison him.