Rex Immortui

His skin was a dull grey, but there wasn't much of it visible. Immortui appeared to be a young man, perhaps just approaching his thirties. His face was remarkably smooth, devoid of facial hair, yet his jaw, nose, and cheekbones were all sharply defined and slightly sunken. It was strange; based on his face alone, it was hard to say whether one would consider him handsome. There was something unsettling about his appearance. Perhaps it was his eyes. The whites of his eyes were completely black, while the irises were red, and his pupils were white. Quinn had encountered many creatures and demons, but he had never seen eyes like this—deep and abyssal, as if one were staring into the void itself. His hair was long and straight, swept back, with one half white and the other half black. Though Immortui's body had a human shape, it was covered in a strange armor that seemed fused to him. The armor appeared to swirl and shift, moving with each breath he took, as if it were alive. It was black and completely encased his legs, but around his waist, just above his thighs, it seemed to have teeth engraved into it, and on his hips, there were two large, red eyes. This was the main reason it was difficult to classify it as mere armor; the eyes on the black material near his hips were moving, clearly alive. Quinn had no idea whether this was part of Immortui's body or a living armor. There were two snake like figures on his shoulders wich crawl to his fists from time to time while

Immortui first turned against the Celestials when the Ancient Ones imprisoned him because of his dangerous ability to turn every living being into a demon. Due to his powers, he was able to create a demon from his own blood. In the end, by training and empowering that demon, Immortui was able to break free. After waging war against the Celestials, he was sealed in the realm of the dead, Zeathun. He is the one who created the vampires when Richard Eno opened a gate to the other world.