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However, although the threat has obviously increased a lot, with Lin Yu's strength, it will not be lost on this third layer.

After killing thousands of Emperor-level demons, Lin Yu found the passage to the fourth layer and entered the fourth layer.

"Huh?"

As soon as he entered this fourth layer, Lin Yu clearly felt something different.

Compared with the previous three layers, the concentration of evil qi in this fourth layer was obviously much stronger, and with Lin Yu's strength, it was greatly suppressed, and the speed of the True Yuan was obviously much slower.

Moreover, at a glance, there was not even a single demon in this fourth layer, and this scene suddenly made Lin Yu look surprised.

He originally thought that as soon as he entered the fourth layer, he would face countless demon attacks, but he didn't expect that it would be such a scene.

"Where did this fourth-layer demon go?"

With a frown, Lin Yudang began to wander around on the fourth floor of this underground palace, and after a moment, his figure suddenly stopped.

In front of him, there was a large number of tents, adding up to hundreds of tents, and around the tents, dozens of demons were patrolling, and in their hands, they still held weapons formed by the condensation of evil energy.

"Tribe?"

This scene suddenly surprised Lin Yu: "These demons have already formed a tribe!"

Although in the third layer, there are already some demons who have a certain amount of intelligence, can control weapons, and even create moves, but that is only the lowest level of wisdom, and can only be said to be an instinct.

But here, these hundreds of demons have formed a tribe, and they even have a special patrol team!

This is no longer explained by simple instinct, obviously, this layer of demons already has a good intelligence, and this wisdom is not even inferior to humans!

"Humans!

At this moment, among those patrolling demons, there was a demon whose gaze swept towards Lin Yu at random, and with this sweep, he suddenly shouted excitedly, and the sound instantly spread throughout the entire demon tribe.

"Finally another human has come down!"

"Kill it, brothers, eat this human being!"

Hearing the voice of the demon, among the hundreds of tents, there were demons rushing out, these demons, at the lowest also have the realm of the emperor, most of them have reached the realm of the fourth-order emperor, and the leader of them has reached the realm of the sixth-order emperor!

"Kill!"

Under the leadership of the leader of the demons, hundreds of demons came towards Lin Yu in unison, and what was even more surprising was that these demons had even formed a battle array!

Although this battle array is a little messy, it is barely formed, and with the blessing of this battle array, their strength seems to have skyrocketed by a level!

"The wisdom of these demons has actually grown to this level!"

Lin Yu's face was solemn, when he was on the previous layer, those demons would only attack in a disorderly manner, but now, they would already join forces to arrange the simplest battle formation, if they continued like this, wouldn't the deeper demons be even more perverted?

However, this is not the time to think about this, as soon as his body moved, Lin Yu's world clone appeared, and then, his body and clone swung their swords together and killed the demon tribe.

This battle took half an hour, and finally, Lin Yu killed all these demons, and their corpses quickly condensed into a thumb-sized bead of evil qi.

Compared with the first three layers of evil qi beads, the purity of this evil qi bead is even better, and the number is much more, if it is put into the outside world, it can be worth a hundred divine crystals.

One hundred divine crystals does not seem to be much, but the entire net worth of an ordinary god and a heavy heavenly powerhouse is worth more than 10,000, and it is very good to be able to obtain a hundred divine crystals in half an hour.

After destroying this demon tribe, Lin Yu continued to search on the fourth layer, and soon, he found several more demon tribes.

Most of these tribes are also a few hundred people, and the strongest one is the realm of the sixth-order Emperor Consummation, plus the blessing of the battle array, the combat power is almost close to the powerhouse of the Divine One.

Every time he exterminated a tribe, Lin Yu also needed to spend a lot of time, and nearly ten hours passed before he found the passage to the fifth layer.

After entering the fifth layer, the number of people in each demon tribe has further increased, almost reaching the scale of thousands of people, and the strongest of them has already reached the stage of the god realm!

Moreover, their battle formations have also become more advanced, and they have become more and more skilled in controlling the war, and their comprehensive strength has reached the level of Jun Tianyou and Meng Xian'er, if they don't use Chaos, Lin Yu will not be able to defeat them.

It took a full three days for Lin Yu to successfully eliminate the five tribes, of course, in these five days, Lin Yu's strength has also improved a lot compared to before.

His Chaos Infinite has also been promoted to a second-order intermediate divine martial art, although there is still some gap between him and Zao Wou-Ki at that time, but that gap is not too far.

Three days later, Lin Yu entered the sixth layer of the dungeon.

Rumble!

As soon as he entered the sixth floor of the dungeon, Lin Yu felt a terrifying aura, overwhelmingly surging towards him, and that aura was full of oppression, making Lin Yu's complexion change suddenly.

"Boy, I've been waiting for you for a long time!"

At the same time, a wild laugh suddenly rang out, and in an instant, around Lin Yu, a full three thousand demons suddenly appeared, all of them were wearing black armor condensed by evil qi, holding blades, exuding an incomparably cold and evil aura.

Among the three thousand demons, a huge demon that was extremely tall, almost ten feet high, stepped out, his whole body was covered in pitch-black armor, and the weapon he held in his hand was not a demonic weapon, but a spear glowing with purple light!

"In the past few days, I can sense that there are tribes disappearing in the upper layer, so I guessed that there are humans coming, and sure enough, I didn't guess wrong!"

The demon's face was full of evil and madness, and he sneered: "It is indeed not easy for a human martial artist who is a fourth-order emperor to break through to the sixth layer, but unfortunately, you ran into me!"

"This spear in my hand is the trophy I obtained by killing a human being, and then I will kill you with this spear!"

He sneered, and his cold voice resounded loudly: "Boy, remember before you die, this king is the Yin King of the Eighteen Demon Kings of the sixth layer of the underground palace!"