It turns out, there is an invisible and intangible "special treasure" within this deep well, called "Displaced Moon."
Every night, the reflection in the well water that looks like the moon is actually a very special "Cataclysmic treasure."
Once used, it can swap places with the moon in the sky.
Afterward, the person controlling it can freely decide the range where it casts moonlight.
All creatures illuminated by its moonlight can be transported by the user to another place where the moonlight reaches. Moreover, it can disregard the world barriers and the isolation mountain range.
This is practically a divine artifact for large-scale troop deployments.
The only issue is that this special treasure is not for unlimited use. It can only be used three times, after which it will automatically shatter and regenerate somewhere in the world.
So, considering it as a one-time item is about right.
However, three uses are enough for relocating the people of the two major sanctuaries.
