Versatile Mage: Summon the Eight Demons at the Beginning

Traveling through the world of full-time mage, Lu Cheng, who thought he could only rely on his legs to make a living, accidentally broke into the demon hell where the eight demons were imprisoned while performing dimensional summoning. Demons, Saints, Immortal Gods, Holy City, Parthenon... "There is no need for the world to continue to grow. It just needs to sleep peacefully under my control."