Lin Mu and his entourage of five flew to the depths of the ancient secret vault, and they didn't stop when they saw those sect ruins along the way.

In this kind of rapid hurry, in about half a day, the Yuan Force between the surrounding heaven and earth slowly became richer, and the originally broken space showed signs of shattering, and the terrifying spatial cracks were like the sickles of death, even if it was an ordinary Nirvana realm, if one was not careful, he would lose his life.

"This place should be close to the center of the Ancient Vault." Lin Mu Road.

"Because of the spatial rift, the deeper you go, the fewer people there are, and there won't be too many people who can really get there." Lin Dongdao.

"The inheritance of the ancient sect is not so easy to obtain, these spatial cracks are just appetizers, and there must be difficulties ahead for us to break through." Lin Mu Road.

The five of them continued to go deeper, and after about an hour, the space suddenly turned red, like a burning cloud, filling the sky, blocking all paths.

It was a red sea of fire that didn't know where it spread, and the sea of fire was rising, as if it was burning this space, and around the sea of fire, the already broken space was burned to show signs of distortion, and the space was extremely unstable.

"Nirvana Burning Heaven Array."

Lin Dong exclaimed, the sea of fire in front of him was a formation, called the Nirvana Burning Heaven Array, if you wanted to enter the deepest part of the secret store, you had to pass through this sea of fire.

The fire in this sea of fire is not an ordinary fire, but the fire of Nirvana, and even if a Nirvana realm powerhouse who has survived the Nirvana Tribulation, it is difficult to resist for a long time.

"This formation is not simple, you have to be careful, don't find Master Mink's Life and Death Wheel Pill, you will fall into it first." The little mink raised his paws and said lightly.

"Let's go." Lin Mu gave the little mink a roll of his eyes, and then with a wave of his hand, he swept into the sea of fire, and Lin Dong and the four of them immediately followed.

As soon as he entered the sea of fire, Lin Mu used his spiritual power to wrap himself and the four of Lin Dong.

The fire of Nirvana can trigger the qi of Nirvana, and the five Lin Mu have all entered the realm of Nirvana, and some of the qi of Nirvana are fused in the Yuan Force, so it is best not to use the Yuan Force.

The Nirvana Burning Heaven Array was used by the Ancient Sect as a Guardian Array, so naturally it would not be so simple.

As he continued to go deeper, Lin Mu noticed that there was an abnormality in the sea of fire in front of him, and when he looked closely, he found that there were firelights in the sea of fire, and the firelight was wrapped in small red balls the size of fists.

"Nirvana Fire Thunder."

Lin Mu recognized the bottom of these small round balls at a glance, this Nirvana Fire Thunder was condensed by pure Nirvana Qi, extremely violent, and exploded at the slightest touch, its power could blow up an ordinary Nirvana Realm powerhouse into serious injury.

"Big brother, is there any way to deal with this Nirvana Fire Thunder?" Lin Dong asked, he obviously knew the power of this Nirvana Fire Thunder.

"Xiao Dong, no matter how violent this Nirvana Fire Thunder is, it is also condensed by the Qi of Nirvana, and your Devouring Ancestral Talisman, as long as it is energy, can be devoured." Lin Mu said with a smile.

"I'll try." When Lin Dong heard this, his eyes lit up.

It didn't drag on at the moment, and as soon as his mind moved, a circle of black holes spread out from behind him, and then the devouring power surged out, and all the fire and thunder beads that swept from the surrounding sea of fire were sucked into the black hole.

Inside the black hole, there were faint muffled noises, and then a majestic Nirvana Qi poured into Lin Dong's body from the black hole.

"Big brother, I'll open the way ahead." A look of joy appeared on Lin Dong's face, this method is not only effective, but he can also get a lot of benefits.

Lin Mu and the four of them followed behind Lin Dong and continued to move forward.

However, this state only lasted for more than ten minutes before it stopped, and the Nirvana Fire Thunder Bead was gone, but there was something more powerful.

The fire of Nirvana is burning, in the fire of Nirvana, a pale black flame is quietly suspended, it is constantly wriggling, as if it has a spiritual intelligence, sometimes changing into all kinds of beasts and even human face shapes, extremely weird.

"This is Nirvana Demon Flame." Lin Dong said in surprise, he had already passed the third Nirvana Tribulation, and he was no stranger to this thing, if he didn't have a way to restrain himself, it would not be easy to deal with it.

"Big brother, leave this thing to me to deal with."

With a way to deal with it, Lin Dong stood up without giving up, and a gentle white light flew out from his palm, quickly condensing into a rune.

The Nirvana Demon Flame seemed to be aware of it, and rushed towards Lin Dong.

The white mang rune was like a net, shrouding the Nirvana Demon Flame, and the moment the two touched, the white mang rune continued to flicker with light, and the Nirvana Demon Flame was strangely contained.

"Sealed."

Lin Dong spit out a word, and the white mang rune suddenly spread out, like a seal, wrapping all the nirvana demon flames, and then with a move of his hand, the white mang rune flew back in front of him.

"It is worthy of being the second divine creature in heaven and earth, although it is lacking in attack power, but it is really omnipotent in other aspects." Lin Mu was speechless.

"In the future, if you fight against others, and suddenly sacrifice this Nirvana Demon Flame, under the five-yuan Nirvana realm, you will be quite embarrassed." The little mink sighed.

Lin Dongqu flicked his fingers, and a trace of Nirvana Demon Flame split out of it, and the surrounding Nirvana fire suddenly rose more and more violently, and the bodies of Lin Mu and the five people vaguely merged into this sea of fire.

"Moving forward like this can save a lot of trouble." Lin Dong said with a smile.

"Let's go." Lin Mu nodded.

Merging with the sea of fire, the speed of progress was much faster, and it didn't take long for the surrounding temperature to seem to show signs of weakening, and everyone understood that they were about to cross the Nirvana Burning Heaven Array.

"Stop." Lin Mu suddenly grabbed Lin Dong and the others.

There was a vacuum in the sea of fire ahead, and there was a black shadow in the vacuum zone, but if you looked closely, there was not only one, but two, but the second one, like them, merged with the surrounding environment, and it was impossible to see at a glance.

"Where did these two come from?" Lin Dong's face was solemn, and the fluctuations that vaguely emanated from the two of them made him feel a trace of danger.

"The aura on these two people is strange, they are a little different from us, they shouldn't be from the Eastern Xuan Domain." Lin Mu Road.

"This space, the Eastern Xuan Domain has had it for a long time."

A hoarse and subtle voice came, causing a storm to be set off on the people except Lin Mu, and they vaguely seemed to have broken some big conspiracy.

"Who?"

It was because of the shock in their hearts that their originally perfectly hidden figures showed a slight fluctuation, and a black shadow in the vacuum suddenly turned around and looked at them.

Lin Mu didn't have any intention of hiding from them, and walked out of the sea of fire directly.

"What did you just hear?" The dark shadow said with a gloomy face.

"What do we hear, and what does it matter to you?" Lin Mu smiled faintly.

"When you hear something you shouldn't hear, you sometimes lose your life, and you have to die today just in case." The dark shadow smiled coldly.

"Rats who dare to covet our Eastern Xuan Domain, I am not prepared to let you leave alive." Lin Mu said coldly, the other two were only in the Four-Element Nirvana Realm, and they were not qualified to be arrogant in front of him.