Two-thirds of the cave is a waterhole, and the remaining third is a pile of rubble.

"You chased that fish here?" Ding Kui flew to the sky above the rocks, lit a torch and threw it into the rocks, and finally found a slightly flat place to fall.

Ao Yu also went ashore, stretched out his legs and swept away a few stones, cleared a clearing around Ding Kui, and said, "Yes, there is no such big cave nearby." How did you get these rocks in?"

Ding Kui picked up the torch and observed the pile of rocks, "The stones are very similar to the ground and the cave, they are not brought in from outside, they should be dug out from the ground or the cave." ”

"When I first came in, I felt that this cave was quite deep, why did it look so big?" Ao Yu looked around at the cave the size of a small movie theater, closed his eyes and felt it, and after identifying the target, he opened his eyes and walked towards a corner, and the boulders that stood in his way were all grabbed by him and thrown into the pool.

"Aha, there's a hole here, it seems to be quite deep. Ding Kui followed Ao Yu to discover a black hole on the ground near the cave, and as he spoke, he threw a fireball into the black hole.

The fireball didn't see the bottom of the hole until it dissipated, "It's really deep, my fireball technique has a downward range of nearly three hundred meters, and I can't see the bottom either, who would have nothing to do to dig such a deep hole in the stone ground?" Ding Kui couldn't figure it out.

"The abnormal energy fluctuation is coming from here, can't you go down and take a look?" Ao Yu didn't know the bottom of his heart.

Ding Kui took out another torch, lit it and threw it into the hole, after about ten seconds the torch stopped, the flame was still flickering, "In the end, it's about four or five hundred meters deep, and if the torch is not extinguished for a while, we will go down." ”

After a stick of incense, the torches at the bottom of the cave were still burning, and Ding Kui and Ao Yu jumped into the black hole.

There was nothing at the bottom of the cave, only a passage leading to nowhere, and the light of the torches could only shine a few meters away, and the darkness around it was unusually thick.

"Your soul power is very strong, why do you need to use torches?" Ao Yu naturally hates flames.

"Creatures with eyes have always admired light. Ding Kui didn't bother to explain so much.

The passage was not long, and Ding Kui and Ao Yu had only walked a few dozen steps before they came to a larger cave.

There is a square hall embedded in the middle of this cave, and the main hall does not look like it was built in a cave, but more like it was squeezed here later.

The top of the main hall is connected to the top of the cave, and it is impossible to see what shape it is, and it is about 20 meters high. The main entrance, which has no door panels, faces the entrance of the passageway, and the inside of the door is pitch black, and it can only be seen from the outline that it is a door.

I don't know what kind of material the outer wall of the main hall was built, and only a faint light reflected back from the fire, and it seemed that most of the light was absorbed.

"It's a little familiar, and I have a bad feeling. Ding Kui said while standing outside the door of the main hall.

"There are energy fluctuations in it, but I don't feel any signs of life, and it doesn't look like it's coming from the demon core, could it be here?" Ao Yu stopped halfway through his words.

Ding Kui glanced back at Ao Yu, and said stubbornly: "Even if it's nothing, will it be harmful in the past so many years?" Go in and take a look, maybe there are treasures." ”

Ao Yu nodded and said, "Let's go, I don't believe it can eat me." ”

"Huh" a fireball smashed into the gate, Ding Kui didn't believe that there was harm in his mouth, but he was still cautious in his actions, not only shooting out the fireball, but also mentioning the "Moon Death" in his hand.

With a "snap", the fireball was scattered by a black whip when it flew to the center of the main hall, and Ding Kui could roughly see the situation in the main hall.

In the middle of the main hall is an ancient altar with a square stone platform at the bottom.

There is a regular pentagon on the stone platform, which is made up of ten triangular black blocks with smooth surfaces, and the seam is like the line of a five-pointed star in one stroke, and the center is a small regular pentagon.

The stone platform was inlaid with a circle of various colored spars and magic cores, of which the number of black spars accounted for more than half.

Around the pentagon are various bone fragments and many strange symbols, and black smoke is constantly emitted from the cracks of the pentagon, forming a black mist above the altar, from which the black whip that draws the fireball sticks out.

The rest of the hall is empty, except for the altar in the middle, which is obviously built specifically for the altar, which shows that this altar has an extraordinary origin.

"Damn, I thought it was some kind of treasure, the altar of the demon clan! Can we pretend not to see it?" Ao Yu scolded and scolded, recognizing what was inside the hall at a glance.

"It's an active altar, and it has to be destroyed. Ding Kui's face was heavy.

After the battle of the Demon Mouse, he checked a lot of classics about the Demon Clan, and used Jiang Tong's rights to access some top-secret files in Zhenjing. The typical demon altar in front of him appeared in the archives many times, and he had no trouble recognizing it, knowing how much damage it could bring to the human world.

Ding Kui aimed at the stone platform and slashed a sword ray, but when the sword was about to shoot to the stone platform, a black fist suddenly appeared, and the sword light was scattered in one fell swoop.

The black mist on the altar was tumbling violently, and the fist that stopped next to the stone platform quickly grew arms, then the body, the legs, and finally a head.

"Dark Elemental Giant, is this a complete body?" Ao Yu exclaimed.

"Impossible, the dark elemental giant that can't be released without the urging of the demons can't release the whole body, you deal with that giant, I'll destroy the altar. Ding Kui raised his sword and rushed towards the altar.

The Elemental Giant is a sixth-level magic, one of the magic that all departments have, and if it is a complete body, it will have sixth-level combat power.

The demons are not only mortal enemies of humans, they are even more unfriendly to dragons, probably because they know that dragons are alien creatures and are top-quality ingredients, and they have never given up on hunting dragons.

Ao Yu was reluctant verbally, but his movements were not slow at all, and before Ding Kui could get close to the altar, he fought with the Dark Elemental Giant.

This dark elemental giant is indeed not a complete body, relying on the energy support on the altar to support only the fifth level of combat power, but in this dark environment, it is on a par with Ao Yu, and even faintly has the upper hand.

Ding Kui knew the source of the dark elemental giant's energy, he rushed to the edge of the stone platform and raised his sword to split, as long as the stone platform was destroyed, this altar would be useless. In this way, more than ten swords were split in a row, and the stone platform was split more than ten to the crack, but the pentagonal shape above the stone platform emitted a cloud of black smoke, shrouded in the crack, and in a blink of an eye, the kung fu stone platform was intact again.

Nima's, it has a self-healing function, I didn't cut it in vain in front of me. No, you have to find a way to destroy the altar, why isn't it introduced in the book?

Ding Kui stared at the altar and pondered.

He turned to the corner of the stone platform, looked at it inlaid with spars, and had an idea: these spars should be the energy source of the altar, this corner has the highest density, if you can cut off a corner, it will definitely destroy the altar, the fire system restrains the dark system, try to use fire magic.

At this time, the dark elemental giant above the altar was fighting with Ao Yu, and he couldn't make a move to deal with Ding Kui, but its advantages were becoming more and more obvious, and I was afraid that Ao Yu wouldn't be able to support it for long.

When facing the Demonic Beast, Ao Yu can use the strength of his body to amplify his strength, but it is useless to face the Dark Element Giant, which is also a fifth-level combat power, and he can't beat the Dark Element Giant on the altar.

Ding Kui didn't think about it so much anymore, and directly brushed a wall of fire on the surface of the stone platform to block the black smoke emitted by the pentagon, holding the sword in both hands and using all his strength to slash down at the corner of the stone platform.

"Moon Death" is worthy of being a famous sword, and it did not weaken its power in the dark, and successfully cut a corner of the stone platform, and even cut a deep trench on the ground of the main hall.

This worked, and the wall of fire blocked the black smoke emitted by the pentagon, and the corner of the stone platform could not be recovered after it was cut off.

The altar has not lost its effect without losing its effect, and the pentagons are still emitting black smoke, but the speed has slowed down, and the black smoke has thinned out a lot.

Ao Yu fought, and found that the strength of the dark elemental giant was a little smaller, and he was not under as much pressure as at the beginning, so he immediately launched a fierce counterattack to bring back the previous disadvantage.

"Good guy, good build. Hmph, I cut off all four of your horns, and I don't believe that I can't destroy this altar. Ding Kui also noticed the change in the altar, which gave him a shot in the arm.

Ding Kui followed the method just now and cut off the remaining triangles of the stone platform one after another.

Although the pentagonal shape on the stone platform was still emitting black smoke, there was only a wisp left, almost like the smoke coming out of a stick of incense.

The Dark Elemental Giant grew smaller and smaller, and slowly its limbs were torn apart by Ao Yu, and finally its head was blown off with a punch, turning back into a cloud of black mist floating above the altar.

"Oh, this hasn't been destroyed yet, it seems that the key to the altar is on the pentagon. Ding Kui said as he jumped onto the stone platform and swept the bone fragments down the stone platform with his feet.

At this moment, the black mist rolled violently again, quickly turning into a dark mirror, and a voice came from the mirror: "Who? Who is destroying my altar?"

Ding Kui was startled, he didn't expect the black mist to make a sound, and hurriedly swung his sword against the stone table to cut to the pentagon.

As the pentagonal shape was cut, the mirror turned into a black mist shattered, and at the last moment the mirror shouted out the words: "Ah, damn it, the altar of the great god of death has been destroyed by an ant, and I will remember you!"

"Bang" There was a loud bang when the black mist dispersed, and a black skull suddenly appeared on the back of Ding Kui's right hand, and he bit it down. Ding Kui hurriedly slapped the skull with his left hand, snapped, and slapped it into the air.

He raised the back of his hand to look closely at the light of the torch on the ground, and saw a black skull imprinted on the back of his hand, and his mouth showed a strange smile.

Ding Kui rubbed the back of his hand vigorously, but when he looked over again, there was nothing.

"Fuck, this, what is this?" Ding Kui immediately carried his fighting spirit to his hand, but there was nothing unusual, he concentrated his mental strength on the back of his hand to examine it carefully, but still found nothing.