The mountain peak was bare, there was no grass, and there was no sense of the existence of any aura, which was almost equivalent to a dead land, but the forest around the mountain peak was full of aura, and it looked very strange.

"What's going on?" Li Yi frowned, feeling incomprehensible.

It was as if there was an invisible barrier around that mountain peak, completely isolating the aura.

"There's definitely quirkiness. Li Yi thought that there was no demon clan on this island, and suspected that it was related to this strange mountain, so after thinking about it again, he decided to go up the mountain to find out.

Being able to completely isolate the surrounding heaven and earth aura means that there must be an extremely powerful force on the mountain, and if he can obtain that power, it is obviously a very tempting thing for Li Yi.

However, he did not rush up the mountain, but sat down on a meadow in the forest, meditated with his eyes closed, and did not go up until his injuries were fully recovered and his spirit was almost recovered.

As soon as he stepped on that mountain, Li Yi felt that the air sank, and the gravity suddenly became much larger, and it was difficult to even move his steps, let alone fly up the mountain.

It took Li Yi more than half a day to climb this not particularly high mountain, only to see that the peak was also bare, except for the stone, there was only a long sword, which was deeply inserted into the mountain, revealing only one sword hilt.

The hilt of the sword has been rusted, and some of the rune patterns carved on it have been blurred, but Li Yi is proficient in alchemy, but he can still tell that the sword is just an ordinary sword, and there is no magic circle engraved in it, not even the lowest magic weapon.

"Who put such a sword in this place?" Li Yi felt even more strange.

Generally speaking, the demon clan fights with physical supernatural powers and rarely uses a sword, which means that there was once a person who came here and inserted an ordinary long sword on the top of this mountain.

Li Yi couldn't understand what the purpose was, so he used his true qi and tried to pull out the sword, but he didn't expect that as soon as the palm of his hand touched the hilt, a huge force came from the hilt, directly flying Li Yizhen out.

Li Yi landed far away, and although he was not injured, he was also shocked and numb, and he was surprised in his heart.

"Why does an ordinary rusty sword have such a strong force?" Li Yi couldn't understand.

He returned to the side of the Rusty Sword again, took a deep breath, and used all his strength to hold the hilt of the sword, this time it was not directly shaken away, but no matter how lucky he was, he couldn't pull out the Rusty Sword, as if the Rusty Sword had merged with the entire mountain and even the entire earth.

"I don't believe I can't pull it out!" Li Yi became competitive, and released the domain out of his body, and the rusty sword was suddenly enveloped by his domain.

With the blessing of the realm, Li Yi's strength skyrocketed several times, holding the hilt of the sword together with both hands, thundering horizontally, and suddenly pulling it out, only to hear a loud bang, and the rusty sword was finally pulled up by him.

But it is a sword about three feet long, and the blade is also rusty, I don't know how many years have passed, Li Yi looked at this sword several times over and over, but still couldn't see anything special, because it was covered by rust, and he couldn't distinguish the material used in the sword body.

He urged his true qi, condensed into a blade, and tried to scrape off the rust on the sword body, but the rust seemed to be welded together with the sword body, fused into a whole, and could not be scraped off at all, so he had no choice but to give up.

Where the rusty sword was drawn, a dark hole was revealed, and there were gusts of warm wind flowing out of it.

In that warm wind, there was an extremely rich aura, even surpassing Li Yi's Mirror Demon Realm, just by taking a sip, he felt that he was very useful, as if he had swallowed a spirit pill.

"Strange, there is no aura outside this mountain, why is there so much aura inside the mountain?" Li Yi was shocked, and listened to the sound under the cave entrance with his ears, faintly, as if he heard the sound of flowing water, and he was even more curious, so he jumped into the hole.

Li Yi only felt that his body kept falling, falling tens of thousands of zhang deep, and his feet had just stepped on the ground, but it was in a small stone room, and in the stone room, there was also a rusty sword, the difference was that the tip of the sword was facing upwards, and the hilt was submerged in a stone platform.

The sound of running water came from inside the stone platform.

Li Yi released the field out of his body again, and held the blade with both hands, thinking that the blade was covered with rust and had no edge, but as soon as he used his hand, he felt a sharp pain in his palm, and his skin had been cut by the rusty sword.

Fortunately, Li Yi is physically strong, otherwise if he were someone else, I am afraid that even two palms would be cut off this time.

He urged King Kong to strengthen his body, continued to draw his sword hard, gritted his teeth and endured the severe pain, and under the blessing of the realm, he still pulled it out more than a dozen times before pulling out the rusty sword.

The stone platform suddenly opened, and inside was a skeleton sitting cross-legged.

Li Yi was taken aback, but he didn't expect that this stone platform turned out to be a coffin, but the entire mountain peak outside was a tomb.

"With the mountain as a grave, who is this person?" Li Yi was curious.

He calmed down, looked at the skeleton carefully, and saw that in the abdomen of the skeleton, there was a strange seed, shriveled on the outside, half the size of a thumb, the skeleton had been dead for I don't know how many years, but this seed still exuded a powerful breath of life.

A small seed is like a sky-swallowing beast, and every breath is enough to shake the heavens and the earth.

"What kind of seed is this?" Li Yi carefully picked up the seed, his heart was shocked, he could feel that the seed in his palm was like a heart, beating violently, as if it was going to break through some kind of restraint, take root and sprout in Li Yi's body, and thrive.

"Before this man died, he seemed to want to refine this seed, but in the end he failed. Li Yi secretly thought, "Could it be that this seed killed him?"

Li Yi continued to look around the skeleton, and suddenly his eyes lit up, and he found that there were dense words engraved at the foot of the skeleton, which turned out to be an exercise, and the name of the exercise made Li Yi feel unbelievable.

Water Emperor!

"How...... How could it be ......" Li Yi was dumbfounded, "Could it be that this person is actually the Ancient Water Emperor?!"

After the Four Ancient Emperors sealed the Seventh Human Realm, they all entered the Demon Realm, and Li Yi originally thought that if the Four Emperors were alive, they would become a great reinforcement against the Demon Clan, but he didn't expect that he would encounter the bones of the Water Emperor here.

"The Water Emperor is dead!" Li Yi said to himself in a daze, "Is it really this seed?"

The dignified Ancient Water Emperor, would he be killed by a seed? Li Yi felt ridiculous when he thought about it, he was more inclined to the fact that the Water Emperor had already been hit hard before refining this seed, probably because he wanted to use this seed to turn things around, but unfortunately in the end he fell short.

But in any case, this seed is absolutely extraordinary.

Li Yi opened the Mirror Demon Realm and buried this mysterious seed in it to see if it would sprout, and what kind of thing would grow after it germinated.

As for the water emperor's formula, Li Yi kept it in mind.

After the Water Emperor Jue is cultivated, he can also comprehend a law, called the Law of Water, which is not much more powerful than the Law of Thunder.

Different laws have different mysteries.

Li Yi kowtowed to the Water Emperor three times, closed the coffin again, and said in his heart: "The ancient Water Emperor would die in such a place by such a powerful person, who killed him? Is it the powerful and powerful man in the demon clan? Where are the other three emperors now?"

Li Yi was full of emotion, knowing that the Water Emperor was dead, which made him feel the horror of the demon clan, far beyond his imagination.

"Since the Water Emperor died on an island in the Necromantic Sea, then the demon clan power that killed him is likely to be on Immortal Island!" Li Yi quickly thought of something.

Immortal Island is the largest island in the Necromantic Sea, and it is also the most mysterious island, even a strong person like the Phantom Venerable does not dare to approach Immortal Island casually, if the Water Emperor is killed by the power of the demon clan, Li Yi feels that the probability of that demon clan power on the Immortal Island is very high.

Li Yi looked down at the two rusty swords beside him, the tips of these two rusty swords were facing each other, and they seemed to constitute some kind of powerful seal, sealing the aura of the entire mountain peak without the slightest leakage.

The two rusty swords are almost identical, the only difference is that the rusty sword at the top of the peak has a bright moon engraved on the hilt, while the rusty sword in the stone chamber has a round of scorching sun engraved on the hilt.

Li Yi put the two rusty swords into the storage bag and prepared to leave the stone room, but at this moment, he suddenly glanced at it and saw a faint fluorescence on the stone wall.

He approached and was overjoyed.

Spirit Crystal!

Hurriedly dug up the stone wall, and sure enough, the spirit crystals behind the stone wall were connected, like a long dragon, directly spreading to deeper places, and it was a spirit crystal vein.

This spirit crystal vein is not much better than the spirit crystal vein on Watch Island, and it is even larger.

The Water Emperor sealed this spirit crystal vein before he died, causing most of the spiritual energy to be locked under the mountain, and only a small part of it overflowed into the surrounding forest, and the demon clan did not come to this island, I am afraid that it is because of this reason.

Li Yi released Xiao Qi, and then urged the Ant Demon Divine Power and the Shadow Demon Divine Ability, and used the True Qi to transform twenty doppelgangers, quickly cut the spirit crystal, and transported it to the Mirror Demon Realm.

As more and more spirit crystals were carried, the aura in the Mirror Demon Realm became more and more intense, and when you walked in, you could see a milky white liquid, floating in the air, which was condensed by the aura.

Li Yi carried it for several days before he had transported this spirit crystal vein, and the aura in the Mirror Demon Realm more than doubled, and the Nine Treasures Tree grew wildly, and a large number of buds emerged.

However, what made Li Yi most excited was that the mysterious seed buried in the soil also moved a little.