The Flame Sabertooth Tiger was a relatively rare fifth-order demon beast, and the red-haired old man didn't know where Li Xuan got the tiger teeth, he only cared about whether there was a demon core.

The demon core is the most precious part of every demon beast, and it is extremely useful in terms of formation, alchemy, and refining.

The demon core is the same as the demon core, it can be applied to all aspects, but the magic core is more rare.

"No, here you go. ”

Li Xuan smiled, and with a flick of his fingers, a fiery red demon core flew towards the red-haired old man.

"Hey, good baby!"

The red-haired old man grabbed it and said with a happy face.

"Well, it's a good baby. ”

Li Xuan also looked at the pitch-black war sword that had just come out of the oven with a hint of scorching aura in his hand, and the more he looked at it, the more he liked it.

"Since it is forged with thousand-year-old fire black iron and flame saber-toothed tiger, in the future, you will be called Fire Fang!"

Looking at the pitch-black war sword in his hand, Li Xuan smiled slightly and muttered, his heart moved, and a fiery red giant tiger phantom appeared on top of the battle sword, roaring suddenly, with a strange magic pattern on his forehead, domineering and evil!!

Master Yan Fei, who forged the sword, had a strange temperament, and he spoke straightforwardly, sometimes changing his face when he said it, but his refining methods were really good.

If soldiers of the same grade are divided according to the rules of casting, there is also a difference in quality.

It's just that some of the differences are very subtle, unless they are casting master-level figures, ordinary people can't see them at all.

The more advanced and famous the refining master, the higher the quality of the soldiers of the same level, which is why there are many cultivators who will look for a certain master to cast soldiers.

Master Yan Fei's name is unknown and hidden in the world, but the level of refining weapons is very smart, and the quality of this fire tooth can be called high-quality in the Xuan-level nine-grade warweapon level.

There were some extra materials in his hands, and after handing over the things to Master Yan Fei, Li Xuan also refined some gadgets.

Under Master Yan Fei's still sighing gaze, after saying goodbye to Shen Yue, Li Xuan left the Northern Wilderness City quietly with the pitch-black sword on his back and the black robe, and continued to look for traces of the strange fire.

After another half a month passed, Li Xuan came to the area where the strange fire was marked on the map, but he didn't feel any flame attribute aura.

Near an inconspicuous cliff corner, Li Xuan found a pitch-black cave, only half a meter in size, even if ordinary people noticed it, they would not take it seriously, they would only think of it as the cave of some demon beast.

"No one has ever discovered such a hidden place, right?"

Between thoughts, Li Xuan raised his hand and patted it, and the earth and stones nearby exploded under the explosion of true qi, and the originally inconspicuous cave changed instantly, the formation fluctuations flooded, and a cave nearly two meters high appeared in front of Li Xuan.

Before entering the cave, Li Xuan waved his hand and laid some concealment methods nearby to hide the entrance of the cave, and then scattered some medicinal powder at the entrance of the cave, and then walked in.

The cave was dark, no one knew if there was any danger in it, Li Xuan stared intently, and it took a long time before he gradually adapted to the darkness here, and his soul perception always paid attention to the movements around him.

While carefully exploring deeply, Li Xuan also carefully observed the situation inside this cave, and found that this cave was not excavated artificially, and there were no traces of axe chisels.

But if it is said to be a natural occurrence, there are some things that are not like it.

"Something, like a passage through which flames melt in extreme heat?"

Frowning slightly, Li Xuan muttered slowly.

Touching the palm of his hand on the stone wall of the cave, there was no burning breath of flames, maybe there was before, but after endless years, it probably dissipated a long time ago.

Li Xuan is originally a fire attribute, in a sense, he will be more sensitive to the flame aura, but here, there is not the slightest induction.

Unconsciously, and unsure of how long it has been, how long this dark cavern passage is, as if there is no end to it.

Li Xuan's eyes finally lit up, and he sensed a trace of residual flame burning aura, although this aura was very weak, it still made him happy in his heart.

Since there is a flame breath, then it means that there may really be heaven and earth different fires here!

With the help of the induction of soul perception, Li Xuan could discern the direction in the dark, and following the faint flame aura he sensed, he continued to explore deeply, and his mood became more and more excited.

Suddenly, a blazing flame aura rushed towards him, and the deeper he went, the richer the flame aura became, and even as Li Xuan went deeper, even the cultivators of the Battle Master Realm were afraid that they would not be able to resist the blazing burning body.

The aura of flames around him became stronger and stronger, and Li Xuan's face became more and more solemn, because the intensity of the flames had increased to the point where all the cultivators of the Great War Master Realm retreated.

Despite this, there was a hint of ecstasy in his solemn expression.

Finally, a light appeared in front of the dark passage, it was a fiery red light, when Li Xuan walked to the end of the passage, what appeared in front of him was a huge flame space, in this vast flame space, it was filled with endless flames, countless flames flowed slowly, like a sea of flames.

The flames were highly condensed in the ground, turning into a viscous liquid that rolled and converged, somewhat resembling but not the same as lava.

"The miracle of heaven and earth creation is amazing. ”

When Li Xuan saw this scene, he couldn't help but admire.

This is a place where fire attribute energy gathers, and some traces of natural formations can be faintly seen, which are not artificially built, but naturally formed by heaven and earth, and born from creation.

"Maybe there's something really strange here. ”

Feeling this level of flames, Li Xuan said with some excitement.

No matter which one it is, the Heaven and Earth Alien Fire is an extremely rare thing, and every strong person who controls the spirit of Heaven and Earth is a big man who stomped his feet in that era, and the whole world had to tremble.

Moreover, Li Xuan once possessed a strange fire, so he naturally knew how powerful these heaven and earth treasures were!!

Suddenly, Li Xuan's pupils shrank, and in his soul perception, a vigorous and majestic breath of life gradually emerged in the sea of fire in the flame space in front of him.

"Roar!"

A roar rang out, and then the sea of fire exploded, and a thick pillar of black and red fire rose up, and a behemoth rushed out of the sea of fire.

There are dark tiger stripes condensed on the huge tiger head, and the flames on the body are flying, and the strange thing is that a pair of fiery eyes are like the sun, and a little black light flashes in the pupils.

This is obviously a fire spirit that was born in an extremely rich fire attribute aura, and the aura that spreads around its body has reached the level of the peak of the fourth order, but because of the special environment here, and the fact that this tiger beast is a strange fire spirit, even if the battle spirit powerhouse is here, it may not be able to subdue it.

"Roar!"

The tiger-shaped fire spirit let out an angry roar, and seemed to be very dissatisfied with someone intruding into his territory, and the flame body that was more than ten zhang long moved instantly, and the huge flame claws blasted directly towards the exit of the passage where Li Xuan was.

Syllable!

Li Xuan's soles stomped on the ground, his body flew into the air, flames rose, and he easily dodged the bombardment of the flame claws.

There was a loud bang, and the claws of the burning flames bombarded the stone wall, and the rubble burst out, and the huge crack spread out for more than fifty meters, and the entire underground space shook violently.

Flames rise, crazy rolling!

"It's just a fire spirit, not enough to worry about!! ！”

Li Xuan shouted loudly, and suddenly pulled out the fire teeth behind his back, this is the first battle since this battle sword was refined!

He took one step, slammed his feet on the ground, and burst into flames, his body appearing almost instantly above the head of the tiger-shaped fire spirit.

The body of the fire spirit rose with blazing and violent flames, and the distance was so close that it seemed that the body was about to be burned into ashes, Li Xuan's body became red, even if the physical body reached the point of being extremely strong, it was also a little uncomfortable.

Cover your body with the devil and resist the monstrous flames.

"Die!"

Demon Yan spurted and condensed, and the fire teeth in his hand slashed down fiercely, and where the blade passed, the air made a sound of explosion and explosion, and the heat was like a white mark.

The pitch-black heavy sword was like a black-red lightning, fierce and invincible.

Boom!

With this sword, Li Xuan didn't spare any hand, and the incomparably violent power and blazing demon Yan rose, directly slashing out the flames on the fire spirit's head, and a large area of flames like blood gushed out.

"Woohoo!!"

The fire spirit was in pain, roaring like madness, a pair of beast eyes locked Li Xuan to death, the beast's mouth opened wide, and then suddenly spewed out a crimson pillar of fire.

This crimson flame is the origin fire of this fire spirit, and by constantly devouring the flame power between heaven and earth, it is the most powerful means of the fire spirit clan to enhance the power of the origin fire.

If the Heaven and Earth Fire Spirit grows to an extremely strong point, it can even devour the alien fire and merge into the natal fire, it will have the opportunity to become one of the most powerful beings standing between heaven and earth.

"Moyan!!"

"Teng!!"

Li Xuan's eyes instantly turned black, and the power of the demon Yan that burned between his palms and fingers suddenly soared, turning into a huge black flame clutch and grabbing towards the pillar of fire.

"Roar!!"

No matter how much the fire spirit roars, it can't escape this clutche, and it is clung to it.

"Devour me!!"

With a sudden drink in his heart, Li Xuan's palm suddenly clenched, and a black hole flame appeared in the sky above the fire spirit, and a surging suction force sucked the fire spirit into it suddenly, and then in an unwilling roar, it was completely swallowed by the demon Yan.

"Whew!!"

Slowly exhaling, after devouring the fire spirit, Li Xuan read the fire spirit's memory and found out the whereabouts of the alien fire, which was located in the deepest part of the center of the magma fire sea below.

In this flame space, because of the naturally formed formation, the majestic fire energy was condensed here, and even converged into a liquid state, forming a scene like a sea of flames.

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