War on Fiction- The War Begins

In a lone planet of Ca-belec, a advanced species known as the Quafligs discover that one of the species they had been monitoring, the Earthlings, had failed to collapse by themselves. They had predicted that the Earthlings would fail to pass many of their own challenges. But the Earthlings had and would become trouble for the Quafligs soon.
Then, they discovered one way to defeat the humans with just one assault- use their own ideas against them. They had discovered that humans had a lot of something known as fictional stories. It ranged from King Arthur, a mystical King and his Knights of the Round Table, to comic books known as manga which include Attack on Titan.
Pitting their own stories and myths against them, the Quafligs decide to see what happens to the Earthlings- will they perish under their own imagination or will they fight over it?