The cave Yang Long mentioned was located on the mountainside of the island's only peak.
The area was overgrown with weeds, and the cave entrance was small, requiring one to stoop to enter.
Mogu's sturdy frame made it impossible for him to get inside.
Qin Ziwen crouched down, examining the low entrance. It was pitch-black inside, and the conditions were a complete unknown.
Therefore, he didn't rush in.
"Master, I'll go in first and take a look," Du Yu said in a low voice.
Qin Ziwen shook his head slightly and glanced back at Yang Long.
Yang Long took the hint. After a moment of hesitation, he said, "I'll lead the way."
"Be careful."
Yang Long took two men to the front. He walked second to last, and Du Yu took up the rear.
After about ten minutes, a low droning sound echoed from deep within the cave, like the lowing of some kind of beast.
A short while later, the four of them hurried back out the way they came.
