Invincible Boss Summoning System

Wang Xie, an office worker on Earth, traveled to another world and relied on the system to become the strongest demon lord, but then traveled back to Earth. But the earth at this time is no longer what it was when he left, with all kinds of superpowers, monks, and powerful monsters. There is also a completely new system. Wang Xie couldn't help scratching his head. "This is a dual system. Now I am no longer invincible." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.