This is amazing! Absolutely love the idea and the way you are doing it. Just a suggestion (I'm not sure it's even possible) I would like to throw out there, and I would like to apologize in advance because what I am going to say is not from Elder Scrolls but I believe it could pertain to this fairly well. For the Phylactery-bound Liches is it possible to make their phylactery a "personal" item (meaning they could bind their soul to anything that they want be it a weapon, gem, etc.). Reason why I ask is because the liches in the Forgotten Realms (d&d) who have phylacteries can make them anything they want. Eagerly waiting for the release!