Earth Valley was a place's name, located in the underground somewhere in Spirit Island, it was a treasure land for cultivation.
This treasure was discovered by the predecessors of the Seraphic Sword Sect and recorded in the "Spirit Island's Secrets". Since then, many people from the Seraphic Sword Sect had entered the Spirit Island to participate in the trial, and they would practice in the valley for a period of time.
This time in the Spirit Island Trial, because the light curtain had the additional teleportation function, the people of the Seraphic Sword Sect were caught off guard as they were scattered one by one.
For most people, being separated was certainly not a good thing, which meant that the possibility of encountering danger and being unable to cope was greatly increased.
I will be using 'formation' and 'array' interchangeably.