Strangeness Has Befallen Me and I Am Invincible in the Adventure House

A strange thing happened, all the demons were destroyed, the immortals and Buddhas could not come out, and the human race perished. In the moment of crisis, countless sages fought desperately to build a line of defense. There were only ten cities left in the human race's defense line. For the future of the human race, the surviving big country established another university, and there was one person who was an exception. His appearance completely reversed the situation of the human race. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.