During the game one npc, dont really remember which one, says about all the bhaalspawn, that they were meant to grow in power which would ultimately, after their death, return to bhaal along with his essence.I've always thought that protagonist, as a half-god, is a powerful being himself and the taint is just a piece of his father's essence, which tries to corrupt and take over the bhaalchild's power and send it right to the throne to make 'The Great Comeback' possible.I may be mistaken, but imho godchild is a godchild, nothing more but sill, nothing less:P When (if) our favourite bhaalspawn gives up bhaal's essence, it's stilll bhaal's essence, and protagonist's essence still stays with him...