As the late third-order sea demon fixed its gaze on them, its savage aura swept through the surroundings.
But after looking for a moment, confusion flickered in the sea demon's eyes. Neither its spiritual senses nor its demonic power detected anything unusual nearby.
"Roar!"
The sea demon let out a roar. Upon hearing it, the surrounding sea demons swiftly sprang into action, weaving demonic power and spiritual senses in every direction.
Thirty li away, Xu Wucheng and the others watched the sea demons react and listened to the roars rising one after another. Their expressions grew grave.
Fortunately, they were still a considerable distance away. Had they advanced to within ten li, they would certainly have been discovered, no matter how extraordinary the Breath Concealing Ring was.
Chen Fei's expression remained unchanged. He let the sea demons roar while the Heavenly Eye at his brow remained steady.
Apart from the initial ripple in the black barrier, it showed no further abnormalities.
Thus, after searching for a while without finding anything unusual, the sea demons gradually settled down.
Xu Wucheng and the other three watched Chen Fei, unsure how he was progressing or whether he had penetrated the barrier.
If even Chen Fei could do nothing, the rest of them would be helpless as well.
They would then have to return to Haiyu City by the same route and report the situation.
Although they had not actually determined what lay behind the black barrier, the sea demons' extreme caution suggested that whatever was inside was no trivial matter.
The mission's rank would rise accordingly, and it would have little to do with them anymore.
After all, sneaking straight through so many sea demons, including late third-order ones, was no easy feat.
An ordinary Joint Aperture Realm cultivator simply could not manage