The monsters in the second room on the second underground floor were the Bladefoot Worms.
The monsters looked like praying mantes. However, they had six pairs of long legs. Four of their hind limbs under their abdomen possessed an incredible jumping ability and grip which allowed them to climb anywhere. They would attack with eight of their forelimbs and each of them was as sharp as a sword, even comparable to an expert-grade relic.
Most insects would have a blind spot on their back. However, the Bladefoot Worm did not have any. Even if somebody attacked them from the back, they would be able to twist their bladefeet to defend against the attacks. They could twist like a professional yogi.