When he saw the picture of the creature on the first page of the file, Gu Jun frowned. It was not the kind of monster he was expecting. It was not a humanoid creature in the picture but something that was more akin to a giant worm. The name 'subterrain giant worm' was labelled under the picture. This kind of worm could grow up to ten meters long in its adulthood, with both its height and width reaching half a meter. It was quite literally a giant worm. It had the same habits as a normal worm. It spent most of its life underground, only surfacing with surprising speed to lunge at its prey, like human beings, to feed. The file did not provide much history or the habitat of the subterrain giant worm. Instead, it focused on the surgical procedure required when dealing with victims of the giant worm. Scanning through the provided surgical examples, Gu Jun felt a chill run down his spine, turning his stomach.