The starting 30 chapters were basically just their to limit the mc and don’t even make sense as a small piece of soul can’t stop a ghost which is a whole soul no matter how angry/sad it is and in the chapters after that his ability to possess people is limited after that when I thought The author was going to make him do actual ghost stuff he gets the ability to make golems which he can possess and is still fighting like a living Being that’s not a ghost.