[TITLE] help me find!!

Please help me find this manwha i read, I cant remeber the name for the life of me.

There is one scene that I have in my head, MC is at a coming of age ceremony where the new candidates to lead the clan go through trials. The first trial is to face the energy of one of the clan elders which she gives through her instrument. This lady (and everyone) expects this guy to fail because he has no inner energy or whatever and so she starts playing but when she realizes he doesn't fall she increases the intensity until the absolute max but the guy still doesn't fall. Eventually they have to stop her because most of the candidates have already failed by now and she's going to kill them. After he passes MC is taken to hospital where one of the King's 2 right hand men becomes his trainer and helps him cultivate his inner energy.

Any ideas plssssss its peak