Cultivators above the Foundation Establishment stage would all face Heavenly Tribulations when breaking through. Whether it was a minor or major tribulation, a grand tribulation, or a great Heavenly Tribulation, it was still a Heavenly Tribulation. This made tribulation crossings of all sizes quite frequent in the Immortal-Spirit Realm.
The spiritual qi of the Immortal-Spirit Realm was exceptionally dense, and it possessed Heavenly Dao laws different from those of the lower realms. There were simply too many chances for Foundation Establishment cultivators to break through to the Golden Core Realm, and for Golden Core cultivators to break through to the Nascent Soul Realm.
This was especially true for cultivators breaking through to the Golden Core Realm; such breakthroughs occurred with great frequency. If that happened, a sect could forget about operating normally. The skies would practically be shrouded in dark clouds every day, with lightning flashing and thunder roaring.
Sect disciples heading out would have to brave flashes of lightning and peals of thunder every day. That was definitely unacceptable.
Thus, quite a few sects had designated areas for breakthroughs. If one was unwilling to use them, one could go elsewhere and choose a place to break through independently.
"Perhaps disciples who returned to rest and recuperate are cultivating. That possibility cannot be ruled out. Elder Lan suspects the Hall of Civil and Martial Arts?"
Tang Feng was clever enough that he did not need to speculate much. He immediately thought of one possibility.
This was a breakthrough in a dangerous area, and it was a Heavenly Tribulation for someone above the Nascent Soul Realm. Although cultivators from the rear halls were cultivating behind them, this was a time of war. Disciples of that level had all been deployed.
Moreover, the Heavenly Tribulation they had spotted was clearly the result