In the end of the Nesser Dynasty, the hatred of the past burst out, and nobody could stop it any longer after the outburst…
Uther died, and had to turn into an undead creature. Then, the King of Nightmares regained control of his body, returned to the Plane of the Undead, and entered the Kingdom of Nightmares, hoping to restore his former glory.
But at this moment, Uther popped up again. He had changed after countless years of life, and was no longer as innocent as he used to be. He became cunning and brutal for his revenge. After he entered the depths of the Kingdom of Nightmares, Uther trapped the King of Nightmares' consciousness in an illusionary world, and made sure that he would always be a prisoner in his kingdom with the Chapter of Blood.
The King of Nightmares had no idea that Uther had been an undead creature all along. He only thought that Uther was dead.