"Hmm? What is this?"

Mu Tian rushed forward, squatted in front of the demon king's corpse, watched for a moment, and muttered while touching his chin.

This is a round groove as big as a duck egg, located at the bottom of the demon king's skeleton seat. If Boxu had not opened the skeleton, he would not have found the round groove at the bottom.

Because of his respect for the deceased and Mu Tian checked the bones at the beginning, he searched the cave hall several times, but he did not investigate the bones again.

Mu Tian believed that there was no problem with the bones being investigated, so he would not investigate again.

This time, Mu Tian and the Breaking Beast were rummaging while exploring their mental power, so even the Breaking Beast was opened to check it out.

After this inspection, the Breaking Void Beast discovered that a groove was hidden under the bones.

And the groove has no breath leaks, as if it is a very ordinary naturally formed groove.

It is precisely because of this reason that Mu Tian and the Blade Beast have investigated several times but have not found it, and they are hidden deep enough.

"Brother Tian, ​​do you think this is a mechanism?"

While Mu Tian was thinking, the Breaking Beast turned his head and looked at Mu Tian with a smile and asked.

"It shouldn't be a mechanism. I think it's like opening the key to a treasure room!"

Hearing the words of the Breaking Beast, Mu Tian turned his head and glanced at her, then touched his chin, and replied meaningfully.

"Key opening? Isn't that a key is still missing? Where should we go to find it?"

The Breaking Beast had no doubts about Mu Tian's saying this was the key mouth, and even agreed with Mu Tian's guess.

But if this is the key port, where is the key?

Without a key, wouldn’t it mean that even if there is a treasure hidden in the cave hall, it would be unfamiliar to me?

If there is such a hidden treasure key, it must be a very precious treasure, priceless.

But such a priceless treasure is hidden in front of you, and you can't see it and eat it. This taste is so uncomfortable.

Even the demon clan, like the Breaking Beast, who does not love treasures, is very much looking forward to this hidden treasure and is eager to know what kind of rare treasures are hidden here.

Mu Tian did not answer the Breaking Beast, but squatted directly in front of the groove, and began to think carefully while looking.

After observing quietly for a long time, Mu Tian turned his head to look at the Breaking Beast and asked, "Xiaobai, do you feel like you have seen something similar to the size of the groove?"

"Xiaobai just woke up for a while, but he had never seen it!" As soon as Mu Tian finished speaking, the Breaking Void shook his head and replied.

"Since entering the cave, have you not found anything that is very similar to this groove?"

Mu Tian looked at the Breaking Beast again and asked.

"Start by entering the cave?"

"Yes, think about it!"

"Yeah! Brother Tian waited for a moment, Xiaobai thought about it first!"

After saying that.

The Breaking Void Beast instantly fell into deep thought, recalling everything he saw after entering the cave, looking for something that matched the groove.

But after thinking about hundreds of breaths, the Breaking Void Beast still found nothing, and did not find anything that matched the groove.

So the Breaking Void shook his head and said, "Brother Tian, ​​Xiaobai didn't pay attention to this small object, so he didn't find anything that matched this groove."

"Think about it again, right in this cave hall, have you seen something that matches me?" Mu Tian continued to ask.

"Brother Tian, ​​you may as well say it directly if you find something that matches it. Why do you need Xiaobai to guess!" The Breaking Beast rolled his eyes at Mu Tian and replied speechlessly.

Mu Tian repeatedly asked the Blade Beast, which was not a fool. Naturally, he guessed that Mu Tian must have found some clues.

"Does it look like this?"

Mu Tian was stunned for a moment, then took out the inner pill of the monster with a faint white light from the Qiankun bag, looked at the Breaking Beast with a smile, and asked.

"Well? This is the inner elixir of the Demon King. Could it be this groove key?"

The Breaking Void stared at the inner elixir of the Demon King in Mu Tian's hand, touching his chin, unable to believe that it was the key.

Generally speaking, the keys to various treasure chambers are all kinds of rare stones or metal jade.

Even Mu Tian has never heard of the inner elixir of the monster as the key. Not to mention that the Breaking Void Beast has never heard of it.

Mu Tian guessed that the inner elixir of the demon king was the key, not out of imagination, but had some basis.

As for the specific basis, Mu Tian did not tell the Blade Beast, nor did he ask.

"I don't know whether it is the key, but you can tell it just by trying it!"

Mu Tian replied to the Breaking Void Beast, then picked up the powerful demon king inner pill and slowly approached the groove.

I have to say that the shape and size of this groove are exactly the same as the inner elixir of the Demon King, and it is not bad at all.

"Okay, it's safe!"

Mu Tian put the Demon King's inner pill into the groove, which was neither big nor small, just right.

“Buzz…”

When the demon king's inner elixir was placed in the groove, within three breaths, a crisp beep sound was made, followed by a white light, and a terrifying demonic aura soared into the sky.

Seeing this.

Mu Tian and the Breaking Beast immediately took a few steps back and did not dare to get too close to avoid accidents and no time to react.

"Brother Tian, ​​it seems that this demon king's inner elixir is really a key, it's simply incredible."

In fact, not only the Breaking Void Beast was shocked, but even Mu Tian was also surging inside and very shocked.

Judging from the current situation, it is obvious that this mysterious groove must have been set up by the dead demon king, and the hidden thing must have been set up by the demon king.

Why do you say so?

Because the key to open the groove is the inner alchemy of the Demon King, then this groove is not the Demon King’s design, who will it be?

You should know that the inner elixir of each monster is different in size. Even the same monster with the same cultivation level has different inner elixirs.

In other words, each monster's inner elixir is unique and unique.

The inner elixir of the demon king is completely consistent with the groove, which can only mean that the groove is set by the dead demon king, because no one except the demon king himself can know the size of the demon pill in its body.

Using his inner alchemy as the key to opening the treasure secret room is cruel and harsh, which makes Mu Tian very interested in the mysterious treasures in this secret room.

"Boom boom boom..."

When the dazzling white light continued to bloom for about ten breaths, the entire cave hall began to shake and shake, as if it was about to collapse.

Looking at the inner pill of the Demon King in the groove, it had shrunk a little, and the energy was disappearing sharply.

soon.

The energy of the demon king's inner alchemy was absorbed by the grooves, and the vibration was intensified, causing Mu Tian and the Breaking Beast to be a little unstable.

At the same time, to be on the safe side, Mu Tian and the others directly exited the cave hall and stood outside the broken stone gate to watch from a distance.

"Boom!"

"Boom!"

After the vibration lasted for dozens of breaths, the position of the demon king's skeleton suddenly collapsed, revealing a huge mouth. With a loud "boom", the demon king's skeleton and the stone chair fell into the bottomless abyss together.

Half a day later, a tremor came from the depths of the ground, and the bones and stone chairs collided at the bottom of the abyss.

"Hahaha……"

"Hahaha……"

"Hahaha……"

Just as Mu Tian and the Blade Beast were about to rush towards the opening, from the bottomless abyss, there were terrible and heart-stopping terrifying laughter coming from...
Chapter completed!