Slaying Demons, Starting with a Fox Spirit!

Li Qin transmigrated into this world and discovered that the wife beside him in bed was a fox spirit! With no other choice, he had to spend his lifespan to slay the demon and save his own life. Not only that, he could also gain the lifespan of demons and monsters and infuse it into items and cultivation techniques. From then on, Li Qin and demons were sworn enemies, and he embarked on the path of slaying demons and exorcising evil!