"Bang! Bang! Bang!" The impacts rang out without pause. The first fish beast had failed to bash itself to death, and now a second came along. Then the fish beasts nearby crowded over, ramming the spatial barrier like participants in some ritual.
A few minutes later, the spatial barrier remained completely still, but quite a few fish beasts had bashed their brains out. Their companions devoured their corpses and continued ramming the barrier. Before long, all the Mutant Rats nearby had retreated, replaced by fish beasts drawn by the smell of blood.
As Xu Huo moved outward, he tried to estimate his approximate location. He had traveled several thousand meters, but probably hadn't even left Central City's boundaries. It was impossible for the rock layers beneath the sea to have been completely broken through. Most likely, only a cavity had been opened around the Mutant Rat nest. There should be another way to enter and leave from beneath the island.
Fortunately, the underground nest wasn't very large. After moving outward a little, he found its edge and followed it around to take a look.
The place where the Mutant Rat nest lay seemed more like a huge hole dug out underground. It was fairly large, but not very tall, and overall resembled a flattened pumpkin. Dozens of waterways connected to the area around it. Judging by their shape, they seemed to have formed naturally. Though they bore signs of impact, the waterways were very spacious and didn't look as if they had been dug out by Mutant Beasts.
Challenge Island was so large, and Xu Huo hadn't explored the area around it before coming ashore, so he didn't know what lay beneath it. Generally speaking, an island was wider at the bottom and narrower at the top—in other words, shaped