Every time he appeared, it would make Ye Mu feel very strange, but the special aura would make everything seem less embarrassing.

"His eyes are also gray, and he doesn't have the breath of a living being, and there is no fluctuation of Xuan Qi when he throws darts......" Ye Mu rubbed his chin with his fingers and muttered.

Suddenly, what Cangzhu said appeared in Ye Mu's mind, "Over the years, the four major academies have sent many people to enter the Boundless Ancient Tomb, and they have also lost a lot of manpower......

"In other words, there are not only five people and me, but also ...... who died here back then, or who have mutated" The more Ye Mu thought about it, the more he felt that his guess was correct.

Judging from his clothes, the gray figure in front of him should have come in from the outside world, but there was no fluctuation of Xuan Qi, nor did he have the breath of a living being, which could only show that he had mutated himself and became a Yin Spirit.

Yin spirit is something that is constantly eroded by yin qi after death, so as to survive in another way.

Of course, they still have the ability to act, but there is no longer Xuan Qi in their bodies, and there is no intention, what supports them is Yin Qi.

And they can only survive in places where the yin qi is heavier, such as cemeteries, graveyards, and some special areas, once they leave these places, their bodies will burst open and disappear completely.

The Moyun Sword swung and opened a dirt pit, burying the gray figure, and Ye Mu walked towards the outside of the cemetery.

Not long after Ye Mu left, around the buried gray figure, streams of gray gas swirled, and finally burrowed into the soil, eroding the gray figure.

And after leaving this cemetery, Ye Mu continued to move towards the distance, he wanted to go deep into the boundless ancient tomb and go to those places that the four great academies had not been.

Only there, something can be gained, and of course, the danger is unknown.

With the sneak attack of the gray yin spirit just now, Ye Mu knew that even if the place that had been explored by the four major academies was not necessarily safe.

Because it has been two years in the outside world, there are only six years in this ancient tomb, and the ancient tomb has not been opened for such a long time, and it is changing all the time.

Therefore, Ye Mu had already carried a few fire runes and thunder talismans in his arms, and the bursting beads in the space ring could also be taken out by Ye Mu in a single thought.

Continuing to move forward, he came to a small stream, and was about to wash his face with water, but Ye Mu paused, because this is a boundless ancient tomb, and the stream here cannot be touched casually.

Looking at the stream carefully, Ye Mu found that the stream was light brown, and at first he thought it was the mud at the bottom of the water, but after a closer look, he found that it was not.

"This water is actually light brown......" Ye Mu looked up and down the stream and muttered.

"This boundless tomb is getting more and more mysterious!" Ye Mu frowned, this place was much more mysterious than the Ghost Mist Sea.

No matter how you say it, the Ghost Mist Sea is still on the mainland, a part of the continent, and after a great war, it evolved into that.

However, this Boundless Tomb is different, the speed of light and time is three times that of the outside world, and it is an independent space, which is still moving.

"Perhaps, there is something strange in this......" Ye Mu crossed the creek and walked towards the other side of the creek.

The trees here are iron trees again, and they are all hard iron sheets like the woods that Ye Mu saw when he first came in.

"I don't know if these trees are dead or alive......" Ye Mu looked up at the treetops, looked at the immovable branches, and muttered.

Walking in the woods, suddenly, Ye Mu stood still, and just now he felt a hint of coolness.

"What's the matter? is it a yin spirit?" Ye Mu frowned, held a fire talisman in his hand, and walked forward cautiously.

Suddenly, a sound of breaking wind came from behind him, Ye Mu didn't think about it, the Xuan Qi was injected into the fire talisman and thrown back.

"Boom ......"

The formation above the fire talisman was urged, and it exploded directly, a wave of fire rushed out, and a gray figure let out a chirp and rushed into the iron tree on the side.

"Who?"

Ye Mumoyun's sword was raised, and he slashed it with a sword, but it was blocked by the iron tree, leaving only a sword mark on the iron tree that was an inch deep.

"Is it a Yin Spirit again?" Ye Mu muttered as he looked at the iron forest that had calmed down again.

Licking his lips, Ye Mu knew that this was not the way, there were not many fire talismans and thunder talismans, and they were all one-time consumables, and one was missing.

"Hurry through this iron forest!"

"Sword step!"

Ye Mu had a plan in his heart, the Xuan Qi surged, and the sword step was cast, leaving an afterimage in the same place, and the main body was already ten meters away.

Flickering, a few breaths, Ye Mu walked out of this iron forest, and just wanted to breathe a sigh of relief, a chill came from the side.

With a swing of the Moyun Sword, a sword light slashed over, and was dodged by a gray figure, and the sword light slashed at the iron tree and cut off the branches.

Without waiting for Ye Mu to be surprised, the gray figure attacked again, there was no weapon in his hand, but his claws were very long, hard as steel, and he confronted the Moyun Sword, making a metallic sonorous sound.

"Damn, is this thing so fast?" Ye Mu scolded in his heart as he struggled with the gray yin spirit.

Ye Mu used his sword steps to leave, and this speed was that ordinary Transformation Realm could not catch up, but this Yin Spirit was like a bone appendage, like a shadow.

Kicking away the gray yin spirit, a fire talisman appeared in Ye Mu's hand, the yin spirit just wanted to attack again, and when he saw the talisman in Ye Mu's hand, he suddenly retreated and jumped to the iron tree on the side.

"So you're afraid of fire!" Ye Mu raised the fire talisman in his hand and said with a smile.

"It's a pity, there are only a few fire talismans, and they still need to be kept, it's really a bit of a waste to deal with this yin spirit!" Ye Mu sighed secretly in his heart.

Taking out a torch from the space ring and lighting it, Ye Mu laughed and said, "Come here, you have the ability to come over, haha...... Dare to stand in the way of the master, believe it or not, I burned your forest with a fire......"

Ye Mu raised the torch and was about to light the iron tree, the yin spirit suddenly let out a chirping, and from the shout, Ye Mu heard an anxious emotion.

However, before Ye Mu could be happy, he found that the torch in his hand was slowly extinguished.

Looking at the torch still smoking in his hand, Ye Mu's eyes were glazed, and he couldn't help scolding: "Damn! Are you taunting me?"

Ye Mu, who didn't believe it, lit the torch again, and this time it went out faster, only lasting less than ten seconds.

"Can't you light a fire here?" Ye Mu found the problem, there was no problem with the torch, that was the problem of this space.

"It seems that the burning of torches cannot be maintained in the independent space of this boundless tomb. Ye Mu threw away the torch and shook his head.

However, what should we do with the yin spirits staring at them in front of them? I finally found a way to restrain them, but it didn't work at all.

"His speed is too fast, my sword speed is not as fast as his, and it is not easy to hit him!"

The Moyun Sword in Ye Mu's hand was glowing with cyan sword qi, and the Dao sword qi slashed away, and the gray yin spirit kept flickering, dodging all the attacks.

"It's impossible to spend a lot of Xuan Qi every time you encounter a Yin Spirit, so it's going to be more and more dangerous......" Ye Mu frowned, thinking about countermeasures.

What if you encounter multiple Yin Spirits at the same time next time, although the attack power of these Yin Spirits is not very high, but their speed is very fast, and this is their home field, and they will be tired to death if they are dragged by them.

The gray yin spirit seemed to be still afraid that Ye Mu would light the torch, so he didn't move for a long time, just staring at Ye Mu from afar.

Seeing that the gray yin spirit didn't dare to come over, Ye Mu suddenly smiled slightly, and said secretly in his heart: "It seems that he doesn't know that the torch can't be lit here, and he is still afraid that I will use fire against him......"

Thinking of this, Ye Mu suddenly turned around and swaggered towards the distance, the gray yin spirit eyes flashed, and he didn't chase after him.

Away from this iron forest, Ye Mu hid behind a stone pile, secretly observed the back, and found that the gray yin spirit was not chasing, and muttered: "He shouldn't be able to leave that area......

"It's a little troublesome, this should still be the periphery of the Boundless Tomb, except for these Yin Spirits, there isn't too much danger, you have to continue to go deeper!" Ye Mu's dark eyes flickered, looking at the gray place in front of him, and thought.

Continuing to move forward, Ye Mu was a little melancholy, "I don't know how the seniors are doing?"

In another place, there was also an iron forest, Jiang Mo was fighting with two Yin Spirits, and between the swings of the silver spear, the surrounding iron trees, branches and bark flew up.

"This Yin Spirit is really difficult...... Jiang Mo picked up the two Yin Spirits with one shot, and frowned.

The figure moved, and flew towards the outside of the woods, and the two yin spirits chased to a distance of five meters outside the iron forest, stopped suddenly, and watched Jiang Mo's figure disappear before returning to the woods.

Glancing back, Jiang Mo muttered, "It seems that these Yin Spirits can't leave that area......"

Falling into a clearing, Jiang Mo looked around and muttered, "I wonder how the night is now?"

Ye Mu left the stone pile and walked into the distance, he didn't know how long it had been, but so far, he had not gained anything.

After about half an hour of walking, Ye Mu was careful along the way, trying to avoid those cold places as much as possible, and came to a ruin.

It used to be a square, with regular floors, broken stone pillars, and stone tables and benches.

Standing outside the square, carefully looking around, Ye Mu didn't dare to walk in and took out a handful of stones from the space ring.

With a wave of the arm, the stone shot out in different directions, falling to the ground without a sound.

"There shouldn't be any traps!" Ye Mu muttered solemnly, raising his feet and stepping into the square.

After taking a closer look around and finding that there was no movement, Ye Mu was a little relieved and continued to move forward.

However, Ye Mu still maintained a high degree of vigilance, and he found that on these broken stone pillars, stone tables, and stone benches, there was a sign, and a long sword with a sword spike was engraved on it.

There are also such signs on the floor, Ye Mu said to himself: "Is this the site of some kendo sect?"

Ye Mu raised his head and looked towards the other side of the square, where there was a screen, stone, and there seemed to be some patterns on it.

"Is this a map? or something?" Ye Mu carefully looked at the somewhat vague patterns on the screen, and muttered to himself.

This pattern is like a certain place, there is a mountain on it, and there is an old man on the side of the mountain, and the long sword worn by the old man on his waist is the sword with a sword spike engraved on the signs that Ye Mu saw just now.

The old man seemed to look at the mountain wall in front of him with a lost face, and his right hand touched a part of the mountain wall, and on one side of this pattern, there was also a winding route carved.

"Is this the map route, leading to that cave?" Ye Mu frowned and muttered.

From the space ring, he took out the paper and pen, and wrote down the patterns and routes on the screen, Ye Mu looked for it in the square again, but found nothing.

Quickly left here, looking at the paper in his hand, Ye Mu puffed out his cheeks, he didn't know if he should go to this place, and he didn't know if this was the map route.

"Let's go check it out, maybe something will be rewarded......"

After thinking about it again, Ye Mu still decided to take a look, because he was already aimless, and now that he has this map, it doesn't hurt to take a look.