"Sorry, I don't quite understand... What do you mean 'teleportation' doesn't work but walking does?" I asked. "Can we walk directly across the void to the fifteenth-floor basement?"
"Yes... provided we first find the direction of the basement." Little Bowl actually nodded.
Then, she added, "To be precise, we actually don't need to truly cross this void... The obstacle itself doesn't exist."
"Non-existence..." I felt like I understood.
Little Bowl continued to explain: "The first thing we can confirm is that the essence of the void is non-existence; there is no space, no time, no matter, and no energy; it cannot be entered or block others, thus it cannot become an obstacle to anything.
"On the other hand, the fifteenth-floor basement is a space adjacent to the time and space of the Doomsday Era. If we combine these two clues, we can come to this conclusion—"
Hearing this, I followed up naturally: "The fifteenth-floor basement... borders the land of the Doomsday Era?"
