A novel that's as good as Chainsaw Man: One Man Knows Down Devil City

Answer 1

There were novels similar to Chainsaw Man: One Man Knows Down Devil City:
1." Dragon Clan: Guru Gojo's template, take over Cassel." Author: Rise in the Midnight Sword

The following is a detailed introduction of these novels:
1." Dragon Clan: Goguryeo template, take over Cassel ": Lu Chen merged with Goguryeo template and originally only wanted to live a simple life.
In a coincidental situation, Lu Chen accidentally came into contact with the extraordinary, and from then on, he had a new understanding of this world.
The Four Great Dragon Kings, the mixed-blood, the Spirit of Words, alchemy, and so on. Lu Chen traveled through the dark side of the world and achieved his own great and extraordinary legend.
Binhai City, highway.
Facing the legendary God King Odin, not only was Lu Chen fearless, but he even used his ultimate skill to heavily injure the other party.
The bottom of the Three Gorge, Bronze Royal City.
Lu Chen entered the city alone and suppressed Norton, the King of Bronze and Fire, with supreme power.
Capital subway, Nibelungenlied.
Facing the King of Earth and Mountain, as well as his former lover, Lu Chen did not hesitate to become enemies with the entire Secret Party and vowed to rescue her from the Dragon Nibelungenlied.
"If there's any karma, it'll be on me." Lu Chen replied calmly in the face of his best friend's criticism.
……
[PS: Half invincible. Lu Chen's appearance and combat power pierced through the ceiling. He tried his best to make up for the regret in the original text.]