Die already!

"What is that thing and how had it been undetected this whole time?" Blake asked.

Having seen the point where the undulating movements had begun and how long the beasts were. It was clear that the beasts had been there for some time now.

[After analyzing the info you have so far gotten from the beast section of the library. I have come to a conclusion that these should be king rank killer earthworms.] The system reported its analysis.

King rank killer earthworms were tier 2 magical beasts that awakened the earth element. They had an average body length of 50-70 meters that was covered by a darkish-purple armor that possessed retractable 2-meter-long spikes.

Although they didn't have eyes, they possessed insane sensory abilities that made them aware of how deep they were in the ground and gave them a 360-degree vision of every part of their body.