Actually, until now, they haven't understood why Nightmare Realm creatures, after arriving at the Pamiji Plateau, didn't continue to erode deeper but instead all gathered in these ruins.
Originally, they thought the Nightmare Realm creatures simply took this ruin as a base, but after occupying it, they didn't expand outward, which doesn't align with the purpose of a base.
Now, Sanders suggests that perhaps the Nightmare Realm creatures aren't taking this ruin as a base but are trying to restore some native object within the ruins. This idea really makes sense.
"Regardless of whether what they're restoring is originally from the ruin, we can be certain that whatever the Nightmare Realm creatures want to restore must currently be inside the ruins," Rhein said, "What we need to consider now is, what exactly are they restoring? What potential dangers could this restored object pose?"