Appearance: Body length ranges from 10 to 50 meters, with a shell as hard as steel. The back is adorned with sharp spines and venom glands, and the eyes emit an eerie green glow. When it moves, the ground trembles, and it leaves a trail of corrosive slime.

Ecological habits: Once regarded as the 'guardian' of the Earth in ancient times, overseeing the food chain, it has since been forgotten by humanity and has mutated. They are social creatures, with the larvae following the mother insect during migration; after the mother insect's death, the larvae will consume her corpse, leaving no remains.

Threat: Ordinary weapons have difficulty penetrating the shell; the weakness is the core of the chest cavity (penetration will result in instantaneous death).

Deserts, jungles, and red forests are all distributed in these areas, and they may become rampaging due to the effects of radiation.

Appearance: The body length reaches several hundred meters, resembling a moving 'sea of grass', with a surface covered in vegetation and luminous tentacles beneath. When at rest, it merges with the natural environment, and upon awakening, it causes landslides and alters the course of rivers.

Ecological Habits: Residing in the 'Land of Darkness' (the Red Valley River Basin), it is regarded by believers as the beast of life and death reincarnation. It feeds on mist, consuming nearby life forms, yet permits pure souls to pass through (such as the Kappa).

Threat: Immune to conventional weaponry, its only weakness lies in the mysterious resonance with the 'Kappa'. When provoked, it will divide into multiple smaller giant insects, forming a swarm.