Last man on earth when there is no earth?

Ch 05.3

The door led to a set of stairs that goes downward, at the end of the hallway that followed them was an elevator that also lead deeper. Unfortunately this one didn’t seem to work so we had to make use of the emergency ladder to get down.

There weren’t any other floors on the way down and after nearly fifteen minutes we arrived to the bottom level.

“Beautiful…” That was the only word I could use to describe what we found there.

It was difficult to believe it's part of the laboratory above. The final level was an underground cave made entirely out of Glassume. There is no mistaking it. The sparkling clear crystals covering every inch of this cavern were the universe's most valuable mineral.

They were everywhere no matter what direction you look. Seven’s gauntlets were indeed a surprise, but this was on a different level. This is an entire mine filled to t