As if alive, the crystal skull emitted an even brighter light, confronting the blue flames around it.

And Lin Xuan was also shocked, he couldn't imagine that the seal of the crystal skull was so strong.

The blue flame spear just now threatened his life, but he didn't expect that he didn't break the seal of the crystal skull, so you can imagine how terrifying the king's seal was.

However, he still underestimated the seal left by the king.

For two whole days, the blue flames did not blast open the five-colored light curtain.

Not only that, Lin Xuan was even more miserable, he suffered in the blue flames for two whole days.

It was a hellish ordeal, and the terrifying flames made him almost faint several times, but fortunately, he gritted his teeth and persevered.

Now, his body is charred black, like black charcoal, which makes people's scalp tingle, but fortunately, Changsheng Jue has a terrifying recovery ability, otherwise I am afraid that he would have turned into a dry corpse long ago.

However, the effect of this hellish burning on him was also enormous.

The body shook, the old black skin on the surface of the body fell, revealing new skin, the streamlined muscles were full of strength, the face was crystal clear, and the skin was delicate, far more than before.

After more than two days of hellish tempering, Lin Xuan's body had undergone earth-shaking changes, and now with his physique, even if he didn't exert any defense, ordinary Double Venerable couldn't do him any harm at all.

This kind of physical strength is comparable to those Venerable Beings who specialize in body refining.

In fact, this is normal, this blue flame is too terrifying, and it also has magical power, no matter who it is, if it can last for two days, it will definitely make the body change drastically.

Of course, except for Lin Xuan, I'm afraid there are few people who can hold out here for two days.

However, what gave him a toothache was that the seal of the crystal skull had not been blasted open.

"Damn, what kind of seal is this, it's too strong!" Lin Xuan's face was ugly, it had been two days, but the crystal skull had nothing to do.

"Why don't you try it inside?" said the Scarlet Dragon.

"That's all there is to it. Lin Xuan stood up and looked into the depths of the seventh layer.

There, there are more stone forests, scattered in between. Moreover, the temperature is higher there and more terrifying!

With a flicker of his figure, Lin Xuan left the place and flew into the distance

The further inside, the darker the color of those flames, the more terrifying the temperature, and in the end, even if Lin Xuan's body had been tempered for two days, he couldn't stand it anymore.

At this moment, the surrounding flames changed from the original light blue to dark blue, like the starry sky and the sea, extremely deep.

The heat contained in it is also terrifying, and every trace makes people's hearts beat wildly, and they dare not be careless. Lin Xuan was sure that even if the Triple Venerable came here, he would also turn into ashes in an instant.

Looking around, Lin Xuan's heart was shocked, he took out a spirit rank mid-grade treasure weapon from the storage ring, and in just a moment, the spirit rank mid-grade treasure weapon turned into a pool of molten iron.

"That's it!"

Lin Xuan didn't dare to go any further, because his body was almost unable to support it, and there was a possibility of burning and bursting at any time if he went any further.

Sitting down cross-legged again, Lin Xuan took out the crystal skull and used the previous method to temper his body while bombarding the seal of the crystal skull.

And just like that, another two days passed. The seal of the crystal skull had not yet been broken, but Lin Xuan's physique was a little stronger.

Now that he was able to adapt to the temperature of the dark blue flame, he decided to go deeper again.

The figure swayed, Lin Xuan walked forward cautiously, not daring to use too fast speed.

It didn't take long for him to notice that the blue flames around him had faded, and a light purple flame gradually appeared.

The temperature of this purple flame was even higher, and with just a trace of it, Lin Xuan was a little unbearable.

"Okay, this is it!" Lin Xuan didn't dare to step forward, sat down and took out the crystal skull.

As soon as the crystal skull came out, the purple flames around it were affected, and they quickly converged, forming a large purple fish, which quickly rushed towards it.

This blow was very terrifying, just the aftermath of that energy made Lin Xuan a little unbearable, and with a low snort, he quickly cast the Red Lotus Battle Armor Phantom, enveloping his body.

Rumble!

In the void, a bright red armor phantom appeared, like a giant mountain, enveloping Lin Xuan.

The next moment, a terrifying heat wave rushed and crashed into the Red Lotus Battle Armor Phantom, making a rumbling sound, but although the Red Lotus Battle Armor Phantom trembled, it still defended.

Seeing this scene, Lin Xuan breathed a sigh of relief.

Fortunately, there was a red lotus armor phantom, otherwise with his current strength, it would still be too reluctant to fight against the purple flames.

The purple color was really powerful, and the big purple fish that formed slammed into the five-color light curtain, causing it to fluctuate violently.

The light on it also faded rapidly.

Lin Xuan was overjoyed, at this level, I am afraid that it will not be long before the five-color light curtain will be broken, and the seal in the crystal skull will probably be broken at that time.

Sure enough, under the wrapping of the lilac flames, the multicolored light curtain trembled violently, and the light became fainter and fainter, and finally, after a few impacts, it couldn't bear it and made a clicking sound.

The entire multicolored light curtain shattered to the ground.

"Broken!"

Seeing the colorful light curtain shattered, Lin Xuan also exclaimed, his eyes full of ecstasy.

He stretched out his palm, condensed a fiery red palm, quickly grabbed the crystal skeleton, and then pulled it hard, and the crystal skeleton was brought to his side.

Feeling the change in the crystal skull, Lin Xuan was also very happy, but he didn't directly detect it, and put it away.

This place was too horrible now, and he had to get to a safe place.

The figure shook, and Lin Xuan retreated towards the rear.

Soon, he came to the dark blue flame region, although the flames here were terrifying, Lin Xuan was completely able to adapt to it.

Fading the phantom of the Red Lotus Battle Armor, Lin Xuan sat on a stone pillar, then took out the crystal skull and looked at it carefully.

Anyway, there were no people in this place, so he didn't have to worry about it at all.

At this moment, the crystal skull, due to the absence of the seal, has become more crystal clear, and the five-colored light is very dazzling.

Taking a deep breath, Lin Xuan's soul power poured out and probed into it.

However, just as he had just come into contact with the crystal skull, the colorful light curtain on it suddenly flourished, enveloping him, and then Lin Xuan felt dizzy, as if his soul had been sucked in.

The next moment, as if time and space were out of order, Lin Xuan came to a strange space.

The surrounding scenery has changed dramatically, and the blue flames of the past have long been gone.

"Don't worry, this is supposed to be the world inside the Crystal Skull. The dark red dragon said.

Hearing this, Lin Xuan nodded, and then looked cautiously in all directions.

There was a blur around him, as if the chaos had not yet opened, and only the scene within ten zhang of him was clearly visible.

Lin Xuan tried to take a step, and as he walked, those chaotic mist slowly dispersed and became clear.

There was a sudden commotion below, like flowing water, and Lin Xuan's figure shook and flew downward.

Then, a river appeared before his eyes.