As a Demon King, It Makes Sense to Bring Out All the Great Emperors, Right?

Yuan Xuan, the peerless demon king who once dominated the Nine Continents, was reborn as the lowest instructor of the Body Tempering Realm at the lowest level of Tianxing Academy. In this academy, which boasts of being a prestigious and upright school, the rules are more destructive than those of the Demon Cult: the last ones are eliminated, and it is all about profit. Yuan Xuan is burdened with a huge amount of debt, and there is only one "waste" girl left in his name whose sword bone was taken away by the righteous genius and her meridians were severed. If he fails the big test in three days, he will face the death of having his soul extracted and refined by the black market! But how vicious is the Demon Lord's vision? What others see as a useless person, in his eyes, is the "Nine Netherworld Demon-Destroying Body" that breaks and stands again! After awakening the "Eternal Demon King's Heaven-Eating Technique", as long as he accepts this group of losers who have been forced into desperation by the righteous way and plants the demon seeds, and his apprentice upgrades and slaps him in the face, he can directly receive ten times the cultivation level in return! Yuan Xuan sneered and completely tore up the hypocritical rules: "If God doesn't accept you, I will!" From today on, he will recruit the best losers in the world and train them all to become the great demon god who dominates the world! When the arrogant and righteous geniuses of the past are trampled to pieces by the "waste", this hypocritical world of cultivation will eventually succumb to the violent rules of the Demon Lord!