Hyuk woon sung apprentice of spear sect. He and his master was killed. Master was poisoned. Reincarnated as no 900 and become heavenly demon. The former heavenly demon,his new master, father of annoying FL fire maiden, was also killed by the same poison, ...fast forward finding culprit went to spear sect safe house then found the 5th knife then went to blood sect. King jianshi formed alliance with heavenly demon, other blood sect. Against inverted cult and imperial(being controlled).. appearance of storng kinda blood jianshi from ancient . ....season 3 orthodox issued declaration of war against demon sect.....later
Chronicles of Heavenly Demon