The Old King is a character in the storyline.
He became obsessed with the three Artifacts of body, mind and soul. He managed to get possession of two of the Artifacts, that of body and that of mind. He took the Artifact of body and matter and paired it with the Artifact of mind and power, without the Artifact of soul and righteousness, the power of the Artifacts became twisted. The Old King’s soul became corrupted and when he died his corrupted spirit lived on and became known as the “Skeleton Wizard”.
The Old King wrote a Journal, which the three heroes find in the Great Castle.