? Glow World: A floating world dominated by the "Spirit Weaving Forest". The leaves of the trees will weave flowing light patterns, and a "light nest" composed of pure magical energy is suspended in the sky. The creatures here (elves, spell masters, and tree whisperers) rely on "spiritual connections" to survive. They can use their thoughts to drive light patterns to form shields and control the growth of plants. However, in the past hundred years, the spiritual connections have continued to decline, the light nests have continued to fall, and the holes created have turned into "erosion zones" that swallow up the spiritual connections.
? Mortal world: On the "back side" of the same planet as the Glow World. Due to gravitational and tidally locked, it will always be in the shadow of the Glow World. Humanity has developed "crystal energy technology", using "underworld crystals" mined underground as energy to drive gear machinery and arc devices. The outline of the city is outlined by the cold light of crystal energy lamps. The connection point between the two worlds is the "Mirror Icefield" in the far north of the mortal world - transparent crystals embedded in the ice that reflect the scene of the Glow World are called "mirrors of the world."
? Ancient contract: Three hundred years ago, the ancestors of the two realms discovered that the world mirror can transmit energy: the glow realm exports "light marrow" to the mortal world (which can purify the pollution of the underworld crystal), and the mortal world delivers "living soil" to the glow realm (which can fill the corrosion zone).
Concept: "What a mirror reflects is never the truth, only the perspective of the person looking in the mirror."
