By the time Su Mo returned to the fifth floor from the elevator shaft, the spiral staircase leading downward had been completed.
Unlike the dark-gray steel staircase in the main shelter, the staircase leading to the sixth floor was actually silver-white.
When he stepped on it lightly, a sensation that was both cool and warm passed through his shoes.
"What's this?"
Su Mo crouched down and stroked the material of the staircase with his fingers.
So comfortable! That was his first impression.
Like the naturally formed hot-spring stones found beside hot springs, this material inherently carried a certain temperature.
Its surface was smooth and delicate, yet when he moved faster, he could feel a naturally arising resistance.
Using it for stairs was simply too wasteful. This stuff would make such a comfortable bed! "Master, an unknown substance has been detected. Should Number Zero conduct a more detailed analysis?"
The small cube in his pocket was also examining the material of the stairs. After a basic built-in spectral scan, no matching data was found in its database. It could be confirmed that this was not a material currently known to humanity.
"Let's wait for now. There'll be plenty of time to examine it later." Su Mo casually replied before standing up and following the staircase down.
Since he had no plans to open the fourth and fifth floors to the public yet, the lighting ended here as well.
However, the moment he stepped forward, the wall beside him suddenly emitted a soft glow, illuminating the path downward.
"Such extravagance. This is another new substance, too, right?"
Su Mo clicked his tongue in amazement.
A stone could actually glow? If he could bring this entire wall back to Earth and sell it as a luminous pearl, it would probably be valued at