After thinking about it, Wu Wu's figure flashed, his spiritual power protected his body, and he drilled into the depths of the underground rift, and after going deep into the ground, he found that the space under the crack was extremely spacious.

The first thing that catches your eye is a karst cave that is more than ten zhang wide, and at the same time, there are more than ten small karst caves of one zhang in size extending on the surrounding cave walls, and there are still hot magma that has just faded on the cave wall.

Wu Wei carefully took out a black short sword and levitated it in front of him, and after a little groaning, he randomly chose a cave mouth and flew inside.

The deeper he went inside, the larger the scope of the cave space, and Wu Wei finally stayed in a cave that was several times more spacious than the cave at the entrance.

It is more like an underground karst cave palace built by man-made, and in the center of the cave there are several round tables, seat piers and couches made of molten latest, and the whole karst cave space is filled with molten lava, which is golden and gorgeous.

The most bizarre thing is that dozens of strange figures are arranged in the shape of a ring on the surrounding rock wall, and those shapes form a three-foot-sized square lattice like a spider web, and the lattice bubbles out of the lattice, and finally falls into a molten pit on the ground.

"Gollum"

Just when Wu Wei was amazed at the strange scene in front of him, bursts of scorching molten bubbles suddenly bubbled in the square lattice on the rock wall, as if something had come out of it, and the temperature of the cave suddenly rose sharply, and a burst of fire filled the entire space.

Wu Wei felt a hint of danger, and he didn't have time to take a closer look, so he dodged and rushed towards the cave path where he came.

Not long after Wu Wei left, fire beasts emerged from the molten bubbles on the rock wall, and the skin of those fire beasts was still very immature, and even their eyes were not fully opened, obviously as if they had just been born.

They struggled out of the lava of the rock wall and finally fell into the lava pit on the ground, only to see the newborn fire beasts bathed in the lava, solidifying and growing at a speed visible to the naked eye.

In just a few breaths, those fire beasts wrapped in molten pulp were fully grown and formed, scorching with flames, fluttering and crawling out of the molten pit, and then chased in the direction of Wu Wei's escape.

One, two, three...

Countless newborn fire beasts poured out like a tide, and the fire beasts passed by, and the scorching molten slurry seeped out from the rock wall, and the fire beasts rolled in the molten slurry like fish in water, and suddenly increased their speed.

At this time, Wu Wei thought that he had moved away from the strange cave palace, and he stopped and looked around, trying to search for traces of humans.

It was only then that he heard a 'bang' sound coming from behind him, and the sound roared like a flood bursting its banks. Without even thinking about it, he pulled his legs and drilled into a cave, and it was clear that the fire beasts were following his breath.

Wu Wei didn't know how long he had been running, he suddenly lost his direction in a panic, there was a dead end in front of the cave, fortunately those dense sounds gradually disappeared, the only strange thing he was that he had escaped in this cave for so long and had not seen a living person.

The rock wall of this karst cave is extremely smooth to the touch, and it is as hard as an iron wall under the blow, Wu Wei tried several times to break a gap, but in vain, after a little groaning, he simply returned the same way and continued to look for another cave entrance.

Thinking about it, his figure flashed, and he rushed back, this underground cave is like a honeycomb, and every cave passage seems to be interconnected, and it is easy for people to get lost in it.

In this labyrinthine cave, Wu Wei was like a headless fly, and he was flying while thinking that such an aimless escape was not a way.

A flash of inspiration suddenly flashed in his mind, why not set up a formation at the entrance of each cave, so that he didn't have to run back and forth, but he didn't know if this defensive formation could stop these weird fire beasts.

Wu Wu flew to a cave mouth and stopped, between his hands pinching the trick, a light curtain the size of the cave mouth appeared in front of him, he moved his mind, and led the molten slurry into runes, which were printed on the light curtain, and suddenly the light curtain was bright red, and finally disappeared.

Now he was able to control the ordinary formation with his hands, but in a few breaths, he had laid a small defensive formation at the mouth of a cave.

Every time he arrived at the mouth of a cave, Wu Wei casually laid out a small formation, if he didn't investigate carefully, he wouldn't have found out where the formation was.

After doing all this, he felt a hint of direction, and he drilled towards the karst cave where the formation was set up, and the four walls of the karst cave could feel the burning sensation of the fire beast group just passing by, and large clumps of molten lava dripped from the rock wall.

In fact, the most terrifying thing in the underground of this cave is not the fire beast, but the fire slurry left on the body of this fire beast.

At this moment, the sound of 'banging' sounded in several caves next door to Wu Wei, and the formation was like thousands of troops and horses galloping, and the entire depths of the ground were trembling violently.

After a moment, wave after wave of fire beasts swept away in the same direction, not coming towards them.

"Kill"

Wu was surprised, he cautiously followed the direction of the fire beast herd, and unconsciously seemed to have gone deep for dozens of miles, and the sound of ten thousand beasts galloping in front of him disappeared, replaced by a burst of tragic fighting.

Wu Wei lurked in a cave and looked at it in disbelief, and a huge karst cave more than 100 zhang wide appeared in front of him, and below the cave was a deep pit, in which the molten lava was boiling, and the scorching waves were steaming, like a volcanic crater.

There are rock walls stretching several zhang around the crater, and twenty or thirty human monks are struggling to resist the swept fire beasts, most of the human monks who resist are in the foundation building realm, almost all of them have a magic weapon in their hands, and they still have the strength to fight in the face of these fire beasts that suddenly went berserk.

Since those fire beasts entered this area, their bodies suddenly became several times larger, and their eyes were even more ferocious, and they rushed towards the human monks like a flood of fierce beasts.