C2748 A Mysterious Phenomenon

"Ah!" Lin Yuanting shouted loudly. He quickly retracted his head, rubbed his ears, and said curiously:

"What exactly is going on inside? Why is there such a strange sound?"

Even though he was experienced, he was still unable to guess what exactly was going on inside!

"Tian Lei, Li Yupeng!" Lin Yuanting shouted toward the cave.

However, there was no response from the cave, not even a sound