Go Back to Ancient Times and Become the Demon King

[Mortal flow + demon cultivator + no plug-ins + traditional immortal cultivation + third person + killing people to seize treasures and collecting younger brothers + partial to the grand world view of Jin Yong's Journey to the West] Lu Zhao was lying down playing a game, when unexpectedly, a Shang burst out of the void, and the overflowing mana tore Lu Zhao's soul apart. When he woke up again, Lu Zhao was already a wandering soul living in the body of a spider. In order to get rid of the spider body and return to human form, Lu Zhao had to start his own spiritual practice in the Shiwan Mountain where demons gathered. (This story focuses on building a cave and gathering companions, demon generals. The protagonist can kill people, but more often than not he recruits younger brothers)