C123 A Battle of the Strong!

The others were startled, but they couldn't figure out what was happening. They all looked at him with bewildered expressions.

Huah Yunfei furrowed his brow and explained, "This formation is radiating both Yin and Yang Spiritual Energy. It's likely the handiwork of those two individuals we encountered earlier. Since the formation is still active, they might return. We need to leave immediately