"Look at this place, it's like a dead calm pond. If it hadn't been for the sunlight reflecting off of it at just the right angle, we probably wouldn't have noticed the reflective surface. Walking in there directly would most likely spell disaster."
"Yeah, it's a good thing we noticed it in time. It turns out this area is quite large. Look, from this point to that point, I estimate it's at least about 20 square kilometers."
"So, this formation must have a certain age. If that's the case, could it be that as time progresses, this swamp will continue to spread to the surrounding areas?"
"Yes, it's very likely. Including the surrounding area, why is it barren? It's because underneath, it's all mud, making it impossible for plants to grow. Gradually, as this swamp keeps expanding, after a few years or even decades, this little island will be completely covered by swamp, and the island will cease to exist."
