The dark divine energy also called 'Tyrannical divine Qi' could be used to perform dark arts. Dark arts just like its name was extremely mystical and equally powerful. Almost on the same rank as Blood Magic. Though, dark arts provided greater mobility and had many auxiliary uses.
In a sense, it could be said that dark arts are more greater than Blood Magic. As they cover a wider-field of Magic. Such as Curses, physical body morphing, spiritual defenses, mind control, and deadly illusions. Most importantly, Dark arts could be used to create an undead skeleton army.
'Zombies vs undead skeleton. I wonder which will come out on top,' Feng thought in his mind as his pupils dilated due to desire. He desired to see a battle of zombie army vs skeleton army.
All in all, If Feng was an overpowered boss before, then now he had become an unbalanced RPG character that can slay the overpowered boss.
The examination and ghost purification finished in three minutes.
Side story:
Jody, "Does that mean we need to be together even when shiiiiiiiii....?ting)?
Feng:through gritted teeth replies (Yesssh) unless you are not sacred of ghost or are powerful enough to defeat one. Hehehehe hahaha uhahahah Huhuhu.