I am Dalteran the great schollar, centuries ago I was the prodigy of the greatest schools of magic, I had a hunger for knowledge like no other and spended my days researching for new knowledge or discovering new spells.
One fateful night after I recovered from a terrible disease I realized the weakness of my body and the dreaded truth that was death. To solve this problem I began my research to discover a way to maintain myself for all eternity, lichdom was the first solution I encountered, but achieving that state undeath would be too much of a risk. After years of investigation I couldn't find anything and that devastating disease had returned to finish what it once started. In my moment of greatest weakness the solution came to me.
I had read about the greater demons but I didn't know thew could manifest in the mortal plane, much less within the protected walls of my chamber. The demon offered me a deal that make all my problems disappear. I would be eternal, no plague or old age would take my life and in exchange he didn`t ask for my soul, but for knowledge, I wold keep investigating and reporting to him any spell that could help in the war against the forces of virtue, I accepted without a doubt. Unfortunately for me the fiend omitted the part where if I ever stopped looking for new knowledge my body would begin to decay.
Now I am trapped in the underworld bound to a fortress where I can read and experiment at my leisure. But soon I will set myself free, I will find a way to stop this curse I bare and with my powers accumulated over the ages I will take my revenge.