How had it alerted so many extraterrestrial visitors?
As it turned out, the Mystery Realm's light illuminated the galaxy. At least, the galaxies nearby could see it clearly. The great elites made some calculations, and discovered that the Moon Occult Mystery Realm had once again opened, so they activated the Transfer Formation, sending their descendants to the Celestial Sea Planet.
Because the Celestial Sea Planet was a great planet in the ancient times, there was naturally no shortage of Transfer Formations that transcended galaxies. However, after the Celestial Sea Planet disintegrated, its level dropped drastically, so no one was teleported here again.
— Transferring once would consume a great amount of resources, and even the Holy Lands would feel the pinch.