Demon Cultivator: I, the One with Thousands of Ghost Flags, Have Become a Saint Through My Merits!

Xu Xuan, a social animal in the 21st century, died saving a child who fell into the water. He unexpectedly came to a magnificent world of immortal cultivation and became an outer disciple of the Ten Thousand Ghosts Sect. If he failed to pass the test in three months to refine a Hundred Ghost Banner, his whole body would be dismantled. The bones were refined into bone tools, the blood was fed with elixirs, and his soul was included in the Ten Thousand Ghosts Banner passed down by the sect. After three months of repeated failures, he was lucky enough to refine a half-finished Hundred Ghost Banner. It lacked the main soul and could not become a real magic weapon. There is no time left to pass the examination, the examination is approaching, and when his life is about to be in danger, a passage to the world of high martial arts in the last years of a dynasty is accidentally opened. In this world, the emperor is fatuous, corrupt officials are in power, corrupt officials are rampant, martial arts cultivators are doing evil, natural and man-made disasters, people are displaced, resentment abounds, and a large number of monsters are nourished and feed on humans. It is like a scene of the end of the world. However. For the demon cultivator Xu Xuan, it is a holy land for cultivation. The martial arts cultivators who do evil can be refined into zombies. The demons that cause trouble in the world are the best materials for refining and upgrading the Hundred Ghost Banners. The resentment that pervades the world is the best tonic for his cultivation, allowing him to overtake others in a wrong way. Just... How could he continue to cultivate and upgrade the magic weapon from the Hundred Demon Banner to the Ten Thousand Demon Banner to become gleaming gold? Even the spells he cast were shining with golden light. Not only did he ignore the right method of restraint, but he could also restrain other magic spells? He seems to have developed extraordinary skills, and seems to be the true form of merit that even giants of the righteous path find difficult to cultivate? He is obviously a genius of the devil...