After falling into the dark abyss, Wu Wei was very glad that he did not end up with no bones as he imagined.

He exuded his divine sense and telepathic power in disbelief, this underground space was as vast as the sea, unusually empty and open, but the surroundings were still dark and dead, and it was dark and uninhabited.

Countless strange stone pillars have sprung up in this vast space like mushrooms after a rain, and the endless stone forest above seems to correspond to the birth, each stone pillar is hundreds of zhang high, towering into the clouds, reaching the sky, very spectacular.

He withdrew his gaze and leaned against a tall stone pillar in severe pain, preparing to recuperate and recover his body, in this strange environment full of dangers, he had to maintain his full state of cultivation at all times.

A day passed quickly, but fortunately, he only suffered a heavy blow in his body, and with the nourishment of the spiritual power in his body, he quickly recovered.

"I'm going to have to see what the hell this is..."

He opened his eyes, recovered from his meditation, then patted the dust off his body, stood up, and walked towards the endless stone pillar forest.

The cold wind came from the passage between the stone pillars, making people feel as if they were in a nine-shaded underground, and the deeper he went deeper, the more he realized that the stone pillars that seemed to crisscross in front of him were actually arranged in a very regular manner.

After about a quarter of an hour, Wu Youshan stood behind a huge stone pillar, only to see a strange circular area ten zhang away in front of him.

Dozens of towering stone pillars were orderly enclosed in a circle, and countless black lightning bolts were densely covered in the middle of the stone pillars, and the lightning flew around, weaving into a circular power grid, covering the area, like a stone formation.

"There are so many mutated divine senses..."Wu Wei looked at the shocking black lightning divine sense, and his heart was surprised and surprised.

"Wow... Wow..."

Faintly audible, the sound of water crashing into the depths of the ground in that circular area was heard, and a bubbling and cold black gas diffused from below.

It's just that every time the cold black gas touches the black power grid above, it suddenly shrinks and settles like a lightning strike, as if it is extremely fearful.

"What the hell is in there..."Although Wu Wei was curious, he didn't dare to get close to find out, and after a little groaning, he avoided the circular area and groped ahead.

However, in less than half an hour, he had seen no less than ten ring-shaped areas like this, and each area was also surrounded by more than a dozen stone pillars, and the black lightning divine sense above the stone pillars was swirling, and the black qi was permeating it, but he couldn't see any abnormal movement in it.

"Roar"

Just as he was in doubt, suddenly an earth-shattering roar suddenly sounded in the annular area in front of him, this sound was as strange and low as he had heard above the stone platform before, full of endless anger, like an earth-shattering roar after countless years of silence.

'Bang, bang...'

Immediately after, a heavy sound of metal chains crashing came from the black air, and the monstrous evil qi surged and rolled, instantly rising into the sky, making people shudder, and in the dark, a tall figure covered in black was breaking through the water.

"This..."

Wu Wu's pupils shrank, and he felt that his tongue was dry for a while, he quickly sacrificed his black short sword and evacuated a distance, staring ahead with his eyes without blinking, and said in surprise: "What kind of monster is blocked here..."

"Whew"

Under the reflection of black electric light, a huge head was faintly visible from the black gas, and two cold lights shot out from the scarlet bloody eyes, and they looked around for a while, which suddenly made people feel a chill.

This monster is extremely tall, more than ten feet tall, with a pair of strange horns on its head, and if you look closely, it has thick black hair all over its body, emitting bursts of fluorescence, and the whole thing is like a Nine Demon God, which makes people dare not look at it.

"Bang, bang..."

The tall monster roared in the black pool with its arms waving heavy chains, shaking the whole world violently, and stone chips were constantly falling from the stone pillars standing around, as if they were about to break out.

"Huh"

Soon, the black lightning that swirled in the sky above the annular area suddenly sent out several lightning rays and bombarded the tall monster, and the tall figure suddenly seemed to have been struck by lightning, and after roaring wildly for a while, it sank into the water again.

"This Black Lightning Divine Sense is obviously much more powerful than what I saw before..."Wu Wei saw the power of this Black Lightning Divine Sense, and muttered in his heart.

"Is this a prison?"

"Why are these monsters suppressed here?"

A series of questions flashed in his mind, but he still couldn't guess the reason for this, he suddenly remembered the old man of Yin Knowledge, it seemed to be extremely familiar with this place, and after a little silence, he transmitted a voice to the old man of Yin Knowledge, and said, "Old man, what is this place?"

After half a ring, the old man of Yin Zhi seemed to have just woken up, and said quietly: "This place is a demon prison, if you don't guess wrong, five hundred years ago, the second human race guardian war, the demon clan was defeated, and many big demons mysteriously disappeared in the world, I think it must be suppressed here by the powerful and powerful people of the human race..."

"Demon Prison..."Wu Wei suddenly set off a storm in his heart, the big demons are all the strongest existence of the demon law, how much magic power does the human race powerhouse have to suppress so many big demons in this five hundred years.

The old man suddenly said with a solemn expression: "It's best to leave this place as soon as possible, this is not the place we should come." After saying this quietly, he fell back into a deep sleep.

Wu Wei wanted to ask again, but the old man didn't respond, and after a little groaning, he had to choose to leave this place, and he didn't know the weirdness and danger of this place.