I suspect that it simply remains, but I might make it so that they begin to Rot and BreakDown at an accelerated rate once they reappear in The Land again.
So could they Raise an undead Richter? even with a death spirit inside and with undead Richter losing most of his skills, he still has a powerful body. Especially now that he is tier 2.
Indeed, although there might be a possibility of unusual Reactions or Effects/Consequences in doing so?
Just keep it in the sarcophagus for a while, it might level up. Though after it is raised casting evolution on it would be interesting.
Would it work? Guess it should - nice thinking. Not sure Richter can control such a powerful creature but its worth the attempt. On the other hand getting murdered by your own corpse is ... not a good way to go.
But would an Tier 2 Undead Chaos Lord be able to absorb the chaos points upon Richter's death? What might the sea of chaos have to offer to an undead Richter?
A selection of goods in each tier from which 3 randomly chosen wares are offered to the potential buyer regardless of your race, alignment etc.? Richter has been lucky so far, but we know he has pulled duds from the sea of chaos.