Hou Niao used the Earth Escape Skill, exploring in the darkness for a long time, basically feeling his way around the spherical energy barrier. Relying on his familiarity with Primordial Magnetic Power, he had managed not to be discovered by the Sea Clan.
But he hadn't found any flaws in the barrier.
If it's an energy enclosure without flaws, that's quite normal; the energy distribution within the sphere is uniform and abundant, stemming from the forces of nature, and its depth is not something a cultivator of his realm can deal with, even a Nascent Soul Master cannot.
During his underground tunneling, he naturally couldn't hear the conversation of Zhu Daren and Tianfeng, but he could feel the increasingly heavy spiritual pressure outside, as twenty thousand Sea Clan and fifty thousand humans clashed, the collision of energies was intense, felt clearly even underground.
The time was approaching.
