Ye Xiaobai looked up thoughtfully at the blue-black pillars that were nearly ten meters high, and then looked carefully at the top, except for all kinds of strange murals, he found nothing.

"Strange ......"

The feeling of being spied on has just appeared.

"Huh? It looks like there's a hole ......."

As he swept his gaze over one of the pillars, he saw that there was a spot in the middle and upper part of the pillar that seemed to be darker.

With a hard kick of his foot and a flick of his whip, he flew towards the middle of the stone pillar, and when he got closer, he found that there was a pupil inside, blinking at him.

"it!"

Ye Xiaobai was taken aback and punched into the stone pillar, using his right hand.

"Puff ......"

A strange sound sounded, and when he pulled out his hand, it was covered in slimy blood.

There were eyes hanging on the tree, he could see with his eyes, and his mind could bear it, but there was an eye in the stone pillar, and he was caught off guard, and his heart was still pounding with fright.

When he ran to the fence of the castle and wiped his right hand clean with an unknown cloth on it, it occurred to him that the eyes should be the same as the ones hanging on the dead trees outside, which were used for monitoring.

Since there is surveillance on the stone pillar, it proves that his words and deeds are seen by others.

Ye Xiaobai gave a middle finger to the sky, and didn't care about those surveillances, there are many such stone pillars in this ancient castle, if he looks for them one by one, he won't be able to find them all in a day.

Anyway, what should be seen has been watched by the people in the surveillance, and what should not be seen should have been seen by some people, so he simply ignored the surveillance, and carried out his plan - to find the location of the laboratory by the way when collecting the souls in the castle!

If he guessed correctly, the lab should be in the depths of this castle.

It was like a mystery palace, and since the rampage had no effect, he decided to collect all the scattered souls in the order of the rings according to the location of the soul highlights in his mind, and as long as he was done, then he should have traveled all over the castle.

Thinking of this, he began to run wildly, and if the laboratory had not been discovered by then, and he was still alive, he would have looked for a way out.

The collection of souls was much smoother than he had imagined, because he found that the souls were stored in various places, such as garbage cans, street lamps, jars, chests, etc., and after he cut those objects with his sword, those souls would automatically fly towards him.

At this moment, he had collected more than 1,200 blood-colored souls, more than 100 green souls, and more than 10 white souls.

This gave him the confidence to break through.

"Hey, this stone carving is so familiar."

When passing through a long corridor, Ye Xiaobai suddenly saw a stone sculpture on his right hand that was about two meters high and surrounded by nine rings of different colors.

"Smack!"

A dirt tail suddenly slammed into his body and hit the wall on the other side!

"Poof!"

Ye Xiaobai spat blood, he finally remembered what this stone statue was, this stone sculpture was eight points similar to the strange snake he encountered in the forest near the dungeon!

was careless for a while, and suffered a lot of internal injuries.

He hurriedly used up ten green souls, feeling that it was finally not so uncomfortable, he slashed it with his sword, and fought fiercely for nearly two minutes, Ye Xiaobai found that this stone sculpture could only move one set of movements - flicking its tail left and right, but he didn't know what material its body was made of, and after cutting out the gap, it recovered in less than twenty seconds.

"Huh? It doesn't seem to be able to get out of the grotto, huh? ”

After Ye Xiaobai was slapped away by the snake's tail again, he was about to rush up, but found that the stone sculpture had returned to its original state, and it seemed that as long as he didn't move it, it wouldn't attack him.

"Damn! It's a waste of time and soul. ”

Ye Xiaobai cursed secretly, no longer entangled with it, turned around and ran over the corridor.

Rushing through the corridor, he came to a new area, which was actually a hollow giant crater with a drop of 50 meters, and the flickering white light formed solid circles about twenty centimeters in diameter, and these rings were like stairs, extending upwards.

Ye Xiaobai looked at the foot like an abyss, looked at it for a long time, and did not see any foreign objects, nor did there exist any souls.

The rings were just level with the hallway, one every five meters in a staircase, and he tried to jump over it, but he was actually standing on the white ring.

Ye Xiaobai studied the energy composition of this ring and found that it was a special energy that he didn't understand, soft and warm, and could carry the weight of his body.

For things that he doesn't understand, Ye Xiaobai's consistent attitude is to cross over and maybe find another solution.

He stepped on the ring and jumped up step by step, and if he didn't rely on his metal manipulation ability, even if his strength was far beyond that of ordinary people, there was a high chance of falling.

This made him wonder if this would be a place for trials, and the abyss below was the place where the bones of the losers were buried.

That's why there are so many souls in this place.

Alternatively, the large crater may have been used to dispose of the subject's corpse.

Thinking of this, Ye Xiaobai looked at the bottom of the pit, and seemed to feel that a cool air was coming up from below.

He quickened his pace, because if he guessed correctly, he should not be far from the lab.

He kicked hard with his foot, feeling like he was playing on a trampoline as a child, and the soft aura blessed a rebounding force, and now he was slowly approaching the top.

"Whew!"

Just when he felt that he was lucky, he hadn't been disturbed for so long, a sound of breaking the air sounded from twenty meters to his right, and a dark object came to him in the blink of an eye.

And he was falling head-down, and finally saw the appearance of the object that attacked him, it had four purple-black wings, about a meter high, and exuded a dark black metallic luster, and what was even more bizarre was that when this guy was in a charging state, the four wings would close together to protect the head, and the inverted triangular tail was exposed, which was actually the appearance of a black big sword! And that big sword is now coming towards Ye Xiaobai at an extremely fast speed.

"What the hell is this?!"

If he hadn't seen the appearance of this guy before he turned into a sword, Ye Xiaobai believed that he would have no doubt that there was an enemy who was good at controlling objects and secretly controlling a big sword to kill him.

"Duh!"

Ye Xiaobai used a long whip to pull his body away from a position, and narrowly dodged it, the tip of the sword, or bird wing, was deeply inserted into the rock wall.

While its body was still stuck in the stone wall, Ye Xiaobai wanted to see the defensive power of this strange experimental subject, but as a result, a sword slashed down, sparks flew everywhere, and he didn't even cut off a single feather!

"How the hell is this going to be fought?!"

Ye Xiaobai was really shocked at the moment.