C76 Seven Academies Origin of Destruction and Sword God of Destruction
Possession was a very difficult thing to do. Ye Ming's Rank Eight Spirit was considered average among powerhouses. Moreover, Possession required a long time of preparation. If he did not prepare the Rank Ten Supreme Expert's soul, he might not be able to do it.
Possession itself was an evil technique. It would also reduce the lifespan of the soul. This was something that could be rejected