Lurking in the Holy City: the Fallen Demon King

Thousands of years ago, during a battle with Fallen Heaven, the Demon God's sword was lost in the human world, and the Demon clan was dormant and waiting to rise. Lucifer Lei, the youngest son of the commander of the Black Flame, possesses the blood of a pure fallen demon. He is ordered to lurk in the Holy Heaven Academy of the human race. Under the alias Long Chen, Zang Feng enters the world, steals the human race's demonic martial arts road, and pave the way for the demon race's comeback. He pretended to be an ordinary student from a poor family, endured every step of the way, and studied in a low profile. Experience in Cangshan Mountain, the undead evil cultivators are causing chaos, and the murderous intentions of all races are hidden. Long Chen accidentally recovers the ancient fallen sword, his blood resonates, and his destiny awakens. On the martial arts field, the three great nobles of the outer court bullied others and forced them step by step. In a desperate situation, Long Chen awakened the devil's mad physique and instantly doubled his combat power! The three moves of Crazy Demon Strike, Crazy Fighting World, and Crazy Shadow Hundred Splits came out at once, and all four of them were seriously injured in the bloody battle, which almost overturned the structure of the outer courtyard. In order to avoid the revenge of the nobles and protect the peerless Qianlong, the vice-dean issued a secret order to send him to protective confinement in the library for half a year. Rumors spread everywhere, and everyone laughed at him for being arrogant and wasting his efforts and ruining his future. No one knew that after half a year of confinement, the boy was completely transformed! He completed the ancient secret book "Mad Demon Technique" to perfection, tamed the violent demonic nature, controlled double the mad fighting power, and quietly revived the broken sword. The poor student who used to be bullied by others has become a hidden dragon, a master of both magic and martial arts! The geniuses of the human race are constantly competing with each other, the undercurrent of the Holy City is turbulent, and the grudges between humans and demons are emerging layer by layer. On the one hand, he is deeply concerned by his close friends from the human race, and on the other hand, he is burdened by the mission of the demon race. Walking in the Temple of Light, my heart hides in the abyss and falls into the sky! When he comes out of seclusion, the hidden dragon will emerge from the abyss, conquer the world with fierce force, and control the ups and downs of the worlds of humans and demons!