Demogorgon is one of the oldest and most powerful demon lords in the Abyss. His name commands fear, respect, reverence and hatred across the planes. Like most demon lords, he was once a primordial, but was twisted and turned into a demon by the power of the Abyss.
He is the current holder of the title Prince of Demons. The title does not grant him rule of the Abyss or the demons, as the chaos of the Abyss recognizes no official titles or authority, but rather one contested for by the greatest demon lords. Demogorgon earned the title for his power, inventiveness and experiments, which unleashed new horrors upon the world. None in the Abyss have proven strong enough to take it.
Also known as Lord of All that Swims in Darkness, he embodies Enervation, Madness, Reptiles, and Aberrations. He stands 18 ft tall arms ending in long tentacles capable of rotting anyone in their grap, reptilian legs and tail ending in a scorpion-like stinger, that can drain life energy, and two mandrill heads, capable of hypnotizing an enemy or driving them insane. During a battle against the god Amoth, Demogorgon's head was cleaved in two and remains that way. His two heads, Aameul and Hethradiah, have their own personalities and exarchs. Most of their plots revolve around trying to kill each other or reunite, a secret kept from his own cult and followers.
He rules the 88th Layer of the Abyss, the Gaping Maw, an ocean with rock spire islands and a lush jungle continent, where his capital Lemoriax stands. His lair is two massive stone towers resembling coiled serpents, lined with spikes, and is said to extend down the the next level, where he meets with Dagon, his old ally.
While Demogorgon is allied with Dagon, his hatred for Orcus is legendary. The two have been at war for centuries, but the Prince of the Undead is not strong enough to actually confront the Prince of Demons.
His cultists are generally insane or psychopaths. When a civilization falls to ruin and depravity, the cult of Demogorgon rises.