God of sword
If the stream was deep inside, Theo would have jump straight.
Sitting straight back, Theo start clean remaining black gu substances, after laying down in stream. while cleaning himself up, Theo start checking his body for anything, that is related to this black gu substance. He notices that his internal injuries were heal, and his basic body tempering was complete. His final and the hardest of the tempering which is spine, was complete, and he didn't knew about it, he was amazed, and daze for couple of minute.