Back then, in order to explore this area, he had spent more than six hundred years opening up the red desert that Li Yan and the others had crossed while flying on their swords.
The old sect master guessed that it should have been the chest cavity of the Dreamreturn Ant. It was filled with poisonous miasma left behind by the Dreamreturn Ant's breathing, as well as all manner of ferocious baleful entities formed after its death.
However, after opening up the red desert, he had been stopped at the two red peaks. After spending another four hundred years, he had only managed to open the narrow passage before them.
In the end, the old sect master had entered only a hundred li before withdrawing. He said that the inside was shrouded in boundless mist. The mist did not harm living creatures, but it made people unable to distinguish east, west, south, or north.
One moment, you might be moving steadily forward; the next, you could already be shifting sideways or retreating. Or you might be circling in one place, life after life.
Even he had not been exempt. Fortunately, the old sect master's cultivation had been formidable, and he had not ventured too deeply, allowing him to retreat safely.
After coming out, the old sect master pondered for a long time before devising a method: establish an array behind the fissure in the mountain.
Then, using the grand array to expand continuously and advance bit by bit, he would ensure that every place he passed fell beneath the array's coverage. That way, people within it would not lose their sense of direction.
Once the array slowly covered the region inside, they could also explore bit by bit in different directions, eventually opening up the entire area completely.
In the