In addition to the promotion, there are a few issues in front of me. Some of the prominent ones are my Soul Energy and Bloodline.
I have no idea how to improve the Soul Energy. Well, I believe that there is a way to do so but I don't know if that's the best way or the worst way.
The sole reason that attribute appeared was because I devoured a demon soul. So there is a chance that I can improve my soul energy by devouring other souls. I mean I have a bunch of souls from not just the monsters that I killed but also the souls of the assassins, at least the ones that survived my interrogation.
In addition to that, I picked up more than a few lost souls wandering around. I threw them into the Soul Container to deal with them later.