At that moment, a vast expanse of dense black clouds lay before them, about fifty li away from Li Yan and the others.
They stood in clear contrast to the cultivators on this side. Those black clouds were like a thick barrier stretching between heaven and earth, completely blocking their path.
Within a hundred li of those black clouds, not a single corpse ghost could be seen below. There was only a deathly silent mass graveyard, as though everything else had long since decayed and turned to earth.
Although Li Yan and the others could extend their Divine Sense into the black clouds ahead to investigate, they could not completely penetrate them.
Moreover, it felt as though every person's Divine Sense had been covered by a layer of oiled paper, allowing them to see only vague shadows of what lay beyond.
"This is the ghost domain that we can control. Back then, our two sects paid no small price to open this place.
"Even these black clouds only became what they are today after being cleansed anew with divine abilities and spells.
"Otherwise, even with cultivations like ours, and despite our skill in warding off poison, entering would likely mean a dead end.
"I heard that the other ghost domains are many times more dangerous. The powerful figures of our sect and the Life-Extinguishing Sect once joined hands and entered those places as well.
"They discovered many powerful corpse ghosts. The environment there was already incomparably vile; it did no harm whatsoever to corpse ghosts and could even aid their cultivation.
"Yet once the powerful figures from our two sects remained inside for slightly too long, dense corpse qi would cling to their entire bodies.
"Even if they defended with all their strength, they could only temporarily ease it. They