Board Thread:Lore Discussion/@comment-60.230.35.86-20140512044045/@comment-10665477-20150208181824

Kinda of the process of becoming a Lich is very obscure, and perhaps they are just a generalization of various forms of undeath.

Mannimarco, the first Lich, became one by absorbing dark Magicka from various artifacts. He seemed never to die, but rather extend his life span through his sorcery, eventually becoming a monster, as his body couldn't take the magic which it was being subjected to. They mention how his skin rotted and his blood became poison.

Hevnoraak, on the other hand, became one by sealing away his life in blood vials, and after, transfering the soul back onto him.

I recommend reading Celedaen's notes, the path of transcendence