C1426 Mysterious Sound Wave of Hidden Dragon Villa

Aooo.

This note was Lee Mingdu's main melody every time he heard a hallucination.

After hearing this sound for the first time, Lee Mingdu immediately thought of the word "prehistoric monster".

After returning to the top, he secretly searched for information related to this kind of voice on the internet.

The sounds that sounded like hallucinations shouldn't be hallucinations. Instead