The long, tortuous goblin cave was filled with eustachian flowers for illumination. Although the goblins can see in the dark, the eustachian flower also functions as a heater and air conditioner for this huge goblin cave.
Eustachian flowers are a type of flower that grows and blooms from moss that lives in dark and damp places.
These mosses usually live on the ceiling of the cave and stick their roots to the surface. The roots will grow leaves and absorb sunlight as photosynthesis.
However, the leaves do not absorb light from the sun, but only the heat. In order to protect themselves, this plant develops a flower-shaped excretory system which is named eustasias.
The eustachian flower then shines brightly at night to emit harmful sunlight.
The use of eustachian flowers as lighting, heating, and air conditioning has been practiced by goblins for decades. Maybe since the first goblins existed and made this cave.
