Yi Yun could faintly hear a series of deep resonating hums, like wind was blowing through the cave.
The sound turned clearer as Yi Yun continued venturing deeper. He came to realize that it was not the sound of wind.
Badump! Badump!
It was the sound of heartbeats.
Yi Yun looked more carefully around the cavern and suddenly felt that the entire mountain seemed to be alive.
This discovery left Yi Yun shuddering. He immediately went to the mountain wall and carefully observed it.
Through the mountain's heartbeat, Yi Yun discovered that beneath the stalactites were white things that resembled veins.
And these white veins were actually all massive bones.
Yi Yun became more alarmed the more he noticed. The entire cave was actually being held up by a set of bones. The skeleton had become a towering mountain after its death and its body's interior was now a spacious cave.