Liches

-Revenents extend life because of their connection to the void. Walrocks who get too connected however are eventually susceptible to becoming possessed. This slow descent is known as <rotbrain>
-The liching ritual avoids this. It requires sacrifices and a portal to serve as a conduit between the sacriifices and the void. The lich uses their essences to give to the void instead of their own, creating a barrier that prevents their possession. This ritual must be constantly completed, with the times varying depending on how many sacrifices a lich gives.
-Liches will furhter continue to mutate beyond becoming skeletons like all blackcasters, except liches who continue the ritual will retian their sentience. Theyll become wierd and freaky like skeletal slenderman.