Cerebremsis is a liche like undieing that is known for is lust for knowledge. Unlike the other Undieing, Ceremebremsis takes no followers. He is instead summoned when a liche of great power seeks out “The great truth”. The liche is then transformed into Cerebremsis and begins the quest.
Upon becoming Cerebremsis the liche’s phylactery is destroyed. Cerebremsis will then begin to capture victims of high intelligence to remove their brains. The liche preserves these brains in jars, keeping them on shelves to form an achieve that the liche that communes with. In essence Cerebremsis uses this collective brain power to form a computer of sorts to answer the ultimate truth. In addition to this, these brains become Cerebremsis’s new Phylactery.