Before any of them could say a thing, there was a flash of white light that appeared..
When that flash of white light disappeared, they found that they were in the middle of nowhere.
This was a place that didn't have a single thing around, other than a cave that was in front of them.
Since there was nothing here other than the cave, they turned their attention to this cave.
They couldn't feel anything when they used their spiritual senses to search the cave, but that wasn't because of how deep the cave was. Rather, it was as if there was something that was around the cave that had blocked their spiritual senses from entering.
It was like there was some kind of barrier around this cave.
Since they weren't able to see through this cave with their spiritual senses, then the only thing that they could do was head in and see what was there.
After all, it wasn't as if they would be able to escape this place if they avoided this cave.