That evening, night had only just fallen.
Two figures streaked through the mountain forest, pushing off one branch after another before landing steadily in front of the cave.
"Huh, you know... it's pretty bright in here!"
Jiang Xiaobai peered into the cave, his expression full of surprise.
Indeed, even from the entrance, the fluorescent glow let him see everything inside clearly.
"This is glowstone!"
As Chu Qingci led the way inside, he brushed a hand over the stone wall and said, "Glowstone like this is rare!"
"I never expected... this whole place to be made of it!"
"Glowstone?"
Intrigued, Jiang Xiaobai leaned close to the wall for a careful look.
It looked rather similar to certain luminous stones he had known about in his previous life.
But whatever the case, stone was still stone.
For a stone to glow, it had to absorb light during the day!
Yet a boulder had previously blocked the entrance, preventing any daylight from reaching this place.
Then how...
Did it light up?
With that question in mind, the two made their way to the stone chamber in the deepest part of the cave.
At that moment, a faint fluorescent glow enveloped the entire chamber.
Jiang Xiaobai glanced around and discovered, to his astonishment, that the wall directly opposite them was entirely made of glowstone!
"No wonder!"
As Jiang Xiaobai stepped forward and examined it, a rough theory formed in his mind.
Unless he was mistaken, part of the other side of this entire glowstone wall was exposed to the outside.
That exposed section could catch the sunlight outside.
That was how this glowstone... managed to illuminate the entire stone chamber!
But Jiang Xiaobai soon noticed something else amiss.
The upper part of the glowstone wall was noticeably dimmer.
Moreover, that area was a neat