My skills are all passive.

Originally, Hao Yun had no intention of carrying such a fuel bottle, but now it seems that it still has some effect.

After waiting like this for about twenty minutes, Hao Yun took Nannan and continued to move forward, trying to figure out what was inside.

After passing through this stone door, the space of the entire passage becomes more and more spacious, and even the top is inlaid with luminous stones, so that everything can be seen clearly.

At this moment, Hao Yun also noticed that there were some strange lines carved on the stone wall, which were connected to each other like some kind of formation.

But since Hao Yun didn't know much about this aspect, he had no way to decipher the mystery and could only be more careful.

Holding the God-Destroying Gun tightly with both hands, if encountering special circumstances, he will definitely shoot immediately.

After walking like this for a while, a newer space appeared in front of the two of them, and there were many stone statues in it, including the monster that Hao Yun killed.

"Senior, isn't that the monster we met outside?"

After Nan Nan noticed this guy, he was slightly frightened and shouted quickly.

"Um."

Hao Yun nodded: "It is indeed something we encountered. This should be some kind of place for sacrifice."

Based on Hao Yun's experience, this kind of place should be similar to an altar, but with so many strange patterns and stone statues, it seems strange. I don't know what the sacrifice is.

After a rough observation, Hao Yun found that there was no stone gate in the entire space, indicating that this should be the deepest place.

If there are any clues, I can only find the answer here.

"Let's take a look around first and figure out what this place is talking about."

"Okay senior."

Hearing Hao Yun's words, Nan Nan didn't dare to hesitate and quickly searched the surrounding area carefully.

But after looking at it, except for the strange altar in the middle, there were no clues or circumstances, which made Hao Yun very disappointed.

I originally thought that by finding this underground palace and opening such a hard stone door, I should be able to find out something, but now it seems that it is just too wonderful for me.

Unwilling to just accept it, Hao Yun focused his attention on the altar, wanting to see if it had any value.

"What is this altar used for? Is it strange that there are dried blood stains inside?"

Standing on this square altar, Hao Yun looked inside and found some black dried blood at the bottom, indicating that this thing was actually used before.

But whether it is the blood of humans or the monster is unknown.

After all, after entering the secret realm for such a long time, Hao Yun only discovered that kind of creature outside the main hall.

As for the other animals in the secret realm, nothing has been discovered.

Just looking at the appearance, there are no clues about the altar, and there is no written information on it. It is very difficult to find clues.

At this time, Hao Yun thought of Nannan again, so he took the initiative to ask: "Do you know how to use this kind of altar?"

In any case, Hao Yun is not from this world after all, and there are many things he doesn't know very well, so it is better to leave them to professionals to solve.

Who said that there is no such thing in the world of superpowers?

Although Nan Nan is not very strong, he comes from a big family and knows many secret things.

Belongs to that kind of knowledgeable existence.

Hearing Hao Yun's voice, Nan Nan quickly walked over. After walking around the altar a few times, he frowned and said, "This altar is indeed strange, and I don't know its function. But if If fresh blood is added, there may be new changes.

blood?

Regarding Nan Nan's words, Hao Yun hesitated for a few seconds and felt that it was a pity to try this method.

Anyway, Hao Yun, who has the ability to restore blood, will not be affected at all if he bleeds a little.

"You stand on one plate first."

Thinking of this, Hao Yun first asked Nannan to retreat far away from the altar, and then used Xiaohong to cut a deep wound in the palm of his hand.

Immediately blood gushed out and dripped into the grooves of the altar.

Because of the effect of Hao Yun's blood recovery skill, if the wound is not made too deep, it may have healed before the blood flows out.

Even with extra force this time, it only took a few seconds for the wound to return to normal.

But for the altar, it must be enough.

What Nan Nan said was indeed true. As Hao Yun's blood flowed into the altar, the entire altar was immediately emitted with a blood-red color and a very strange aura.

Seeing this situation, Hao Yun also retreated quickly, worried that the unexpected situation would affect him.

For some reason, as the blood light became more and more intense, a black thing suddenly appeared in the middle of the altar, and it was gradually changing into a human form.

Hao Yun immediately frowned.

Because this scene looks like some big devil has been released.

He couldn't help but smile bitterly and said: "We seem to have done something bad. Please be careful later and leave this space if you have the chance."

"sorry."

Feeling the aura, Nan Nan also knew that he had done something wrong, and his heart was filled with self-blame.

Originally, she just told what she knew. She never expected that such a result would occur. If some powerful demon was really released, then both of them might not be able to escape smoothly.

"This has nothing to do with you, just be careful."

Hao Yun certainly wouldn't blame Nan Nan for this kind of thing, so he said something to her immediately, and then stared at the thing that was about to turn into a human form.

After all, he was the one who put the blood in, so this situation naturally had nothing to do with Nan Nan.

As the saying goes, the first to strike is the strongest, and the last to strike will suffer. Although he didn't know what this guy was, Hao Yun always felt that if he let it grow, it would be very disadvantageous to him.

So he immediately picked up the God-killing Gun and fired several shots at the black shadow.

But strangely, the God-killing bullet went straight through the black shadow and successfully hit the stone wall behind it.

In desperation, Hao Yun pointed the gun at the square altar again, and smashed it directly with a few shots, hoping to stop the gradual expansion of the black shadow.

Unfortunately, it still didn't work.

That's it.

After waiting for a few minutes, I saw that the black shadow had completely turned into a human form, and even its facial features could be seen.

It must be at least fifty years old.

"Hey, what the hell are you?"

Facing this situation for the first time, Hao Yun simply summoned up the courage to shout, wanting to see if this guy was sane and able to communicate.

Otherwise, if a fight really broke out, Hao Yun would probably be at a disadvantage, because the guy was immune to physical damage!