C336 Demonic Beast

Yu Wen looked at the huge earthworm in front of her with interest. This was the first time she had seen such a huge earthworm. Although the ancient books had mentioned that there had been Demonic Beasts in the Terrin World before, they had all been extinct thousands of years ago. How could she still see a living one?

Why did the Demonic Beast go extinct? This was a simple question