In Xia Mu's conjecture, the beast prison should be a small black room similar to a cage, but when he walked closer and took a look, he realized that he was taking it for granted.

The so-called beast prison is actually a huge mountain as high as 10,000 feet, the whole body is dark, and it is all made of an innate grade material that Xia Mu does not know.

And the place where the ancient murderer is sealed on the mountain is a series of dark caves, each cave is extremely deep, and from a distance, it seems like a black hole that will choose people to devour at any time.

I don't know if it's an illusion, Xia Mu always feels that in those caves, there will occasionally be a faint gaze looking at him, but when he looks at it carefully, he can't see the slightest clue.

However, it is gratifying to note that outside these caves, there is a stone tablet that records some information about the beast that was sealed in the cave.

The information covered in it is quite rich, and even when the fierce beast in the cave was sealed into it, and who sealed it are all engraved on it in detail.

Xia Mu only glanced at it cursoly, and found that the fierce beasts that were sealed in the cave, the worst of them all had the overlord level, otherwise they wouldn't even have the qualifications to be sealed.

Walking to the foot of the mountain, Xia Mu came to a cave, but he did not walk in recklessly, but looked at the stone tablet in front of the cave entrance first.

What is sealed in this cave is a mid-level mutant wolf lion of the overlord level, who is born to control the dual laws of gold and wind, and under the full explosion, it can exert a combat power comparable to that of a high-level fierce beast of the overlord level.

"Overlord-level mid-level fierce beasts, except for the turtle clan, the longest can not live for 10,000 years, and now that so much time has passed, this mutant wolf lion is probably dead......" Xia Mu muttered in his heart, and immediately took out a fire talisman from the Qiankun Ring with one hand after taking a closer look outside the cave, and threw it out directly.

"Poof".

The fire talisman burned the moment it was thrown, and turned into a ball of green flames and flew towards the depths of the cave, all the way unimpeded until it disappeared at the end of Xia Mu's sight.

Seeing this, Xia Mu raised his eyebrows slightly, his hands quickly sealed, and after reciting words in his mouth, he spurted out a ball of essence blood from his mouth, and then made one seal after another.

With a "hum", as one seal after another was struck, the ball of essence blood began to undergo amazing changes, and under Xia Mu's control, it turned into a blood-colored shadow, and in a flash, it jumped into the cave.

Then Xia Mu's hand kept changing, but his eyes were already silently closed, as if he was using some kind of secret technique to observe the situation in the cave.

After about half a cup of tea, Xia Mu slowly opened his eyes and dispersed the magic trick in his hand at the same time.

"It seems that most of the sealed wolf lions in this cave have fallen...... Or he has already escaped, in this case, he can venture in and check it out, but the seal at the entrance of this cave ......" Xia Mu pondered for a moment, and a hint of strange color flashed in his eyes.

According to Mathas, if the seal that sealed the beast in the beast prison disappeared, there were only three possibilities, one was that the energy to maintain the seal was exhausted, causing the seal to dissipate on its own, the second was that the beast inside forcibly broke the seal, and the third was that someone forcibly opened the seal from the outside world.

Of the three situations, the first of them is the most likely to happen, but there are exceptions to everything, and Xia Mu doesn't dare to guarantee it.

After hesitating for a while, he finally made a decision, took out the void blanket from the Qiankun Ring, and slowly flew towards the cave.

As soon as I entered, a damp smell with a faint musty smell poured out of the cave.

Xia Mu's eyes flashed, and he really saw the situation in the cave.

I saw that the cave was dark, and there was a black tunnel that seemed to be very hard, and the stone walls on the left and right sides of the tunnel were covered with claw marks several inches deep, which were obviously from the hand of the wolf lion.

Xia Mu quietly sensed in place for a moment, and after finding that there were no other forbidden formations in the cave, he took a deep breath and urged the void blanket to continue to sneak forward.

However, just as Xia Mu urged the void blanket to pass through a corner in the corridor, suddenly the surrounding stone walls fluctuated, and then the aura was generous, and one formation with a diameter of several zhang was launched without warning, and Xia Mu, who had escaped into the void, was enveloped in it.

"Not good!"

Xia Mu "chuckled" in his heart, and immediately realized that the third situation that he felt was the most unlikely had happened, someone had arrived at the beast prison before him, and had already broken the seal and entered the cave in advance, so it seemed that his previous tentative actions had already been understood by the other party.

Without thinking about it, Xia Mu put away the void blanket and blasted out with a punch, intending to forcibly break the formation that trapped him.

"Boom".

Xia Mu struck with all his strength, and with one punch, he broke through the light array that trapped him, and his body flickered, and he retreated sharply.

However, at the moment when Xia Mu retreated and glanced around, a purple light flew out from behind and hit the back of his head, vicious and insidious.

This is a cone-shaped spirit treasure, which can be the thickness of a thumb, and the tip is extremely sharp, even the void is directly penetrated, if it hits a person's head, it is destined to kill with one blow.

However, Xia Mu's reaction was also extremely fast, the back of his head seemed to have eyes, and at the moment when the purple light flew out, the Taixu Cloud Technique unfolded, and his body avoided this fatal blow in a flash, and the whole body was emitted with firelight, protecting the whole body.

"It's good to be young, this critical reaction is fast. ”

Not far from the entrance of the cave, an old man in gray appeared, thin as wood, full of white hair, and his eyes flashed.

Xia Mu was afraid for a while, if it weren't for his strong strength and keen perception, he would definitely be killed by the series of attacks just now, this old man was very strong, and his scheming was deep enough, not an existence that could be dealt with simply.

Huan'er felt that she was very derelict in her duties, the previous series of changes were so fast that it didn't react at all, if Xia Mu wasn't alert enough, it would really be dangerous, and immediately escaped from the Fetal Palace Spirit Lake, transforming into a petite golden dragon and landing on Xia Mu's shoulder, glaring at the old man angrily.

"The predecessor is a human race, don't you feel a little lost your identity when you sneak attack a junior like this?" When he identified the old man's ethnic camp, Xia Mu was also stunned, he didn't expect that the person who made the attack was actually the same human race as him.

However, the old man smiled slightly and said, "The old man is just a test, I didn't expect that a junior of your age already has such strength." ”

Xia Mu didn't speak, carefully observing the other party, he became more and more frightened, this old man was full of prohibitions, it seemed that he was trying to seal his own breath and not let the outside world sense it.

This made Xia Mu's heart beat violently, because he had heard that there was an immortal realm powerhouse who infiltrated the border battlefield in order to avoid a strong enemy, and he hid it for thousands of years, but he was later discovered, and he was killed on the spot by an eternal saint guarding the border battlefield.

If the old man in front of him also belongs to the above situation, then the fun will be great.

Of course, if the other party is really an immortal realm powerhouse, then the map of his infiltration into the border battlefield must be very large, and he must not make a big move easily.

"Since the seniors have already been tempted, can the juniors go? Xia Mu said.

"Yes, I'll send you on your way right now. ”

The old man had a grim smile on his face.

"What do you mean by this, senior?" asked Xia Mu with a cold glint in his eyes.

"I heard that the Seventh Holy Son of the Yin Yang Holy Dynasty is willing to exchange a congenital-level spiritual treasure for your head, I think this deal is very cost-effective, what do you say, Xia Mu Xiaoyou!" said the old man, with a strong smile.

When Phantom heard this, she immediately became angry, and said, "Old thing, with me, you don't want to touch the master's cold hair." ”

Swish!

With a flash of golden light in the void, the phantom disappeared from Xia Mu's shoulder in an instant, and appeared in front of the old man in the blink of an eye, stabbing at his eyes with his claws.

"What a spiritual pet, he actually has the magical power to shuttle through the void. Seeing Phantom suddenly appear in front of him, the old man's eyes lit up, the ghostly light flashed in his eyes, and two cold rays shot out of his eyes, flying towards Phantom, but he was dodged by Phantom, and his figure flashed, and appeared behind the old man, and the golden dragon tail flicked and slapped the back of the old man's head.

In an instant, the golden light flashed, and the dragon tail of the phantom suddenly magnified in the process of pulling out, turning into a huge golden hammer and smashing out, this is the transformation energy it possesses, which can transform any part of the body into a spirit treasure, and the power is quite terrifying.

With an exclamation, the old man staggered back, with an incredible look in his eyes, although he was self-proclaimed to cultivate, but he thought that his body was strong enough, and he reacted quickly, and he punched out with a backhand at the moment when the golden giant hammer hit, he never thought that he couldn't bear it, and his entire arm was directly smashed to a creak, and his finger bones were shattered on the spot.

You must know that he is a true immortal realm powerhouse, although he has self-proclaimed cultivation, he can only exert the strength of Yicheng in his heyday, but such a result still makes him a little unbelievable.

"Are you...... Lingbao's body?" Finally, he came back to his senses and recognized the phantom's body, and his eyes immediately lit up.

"Phantom, come back!" At this moment, Xia Mu spoke, calling Phantom back to his side, some attacks were unexpected, when the other party was on guard, it would be difficult to succeed again.

"Very good, I didn't expect you to have such a heavy treasure on you, so it seems that my shot this time is worth it. The gray-clothed old man looked fierce, and he didn't see how he moved, a purple light suddenly rose from his body, and a huge spiritual pressure was vented, and then he saw that in the purple light, a giant phantom slowly appeared.

The giant phantom is surrounded by purple light wheels, and he is wearing a wide imperial robe, which can be vaguely seen embroidered with the pattern of a nine-clawed purple dragon, and although the giant's face is blurred, he can clearly see that he has a nine-clawed crown on his head, and his body is full of the majesty of the imperial road.