Chương 678: Chapter 678: Hidden Depths

Zhao Haiyun's aura was fierce, comparable to the Fifth Layer of the Heavenly Human Realm.

Even though Gu Ding wielded a mid-grade Spiritual Artifact, his aura was only at the peak of the Third Layer of the Heavenly Human Realm.

The gap in strength between the two was immense.

"Boom!"

"Humming!"

In an instant, the two fiercely clashed with a massive boom that echoed throughout Xuanhuo Mountain. The violent and terrifying waves of energy swept out wildly, causing a fierce wind to arise and the ancient trees in the mountains to sway violently.

In the ferocious clash, Gu Ding did not fall into a disadvantage, but his face looked strained.

"The gap is indeed huge," Feng Wuchen thought to himself. Feng Wuchen hadn't left, knowing full well that Gu Ding was no match for Zhao Haiyun. How could he stand by and watch Gu Ding die?

Moreover, since Gu Ding had risked making a move just now, Feng Wuchen couldn't just stand by and watch, right?