The big demons and the natal spirit treasure are in exchange for cultivation, and they use their own yuan power and even the natal essence blood to temper day and night, so that the grade of the natal spirit treasure will also increase with the growth of the strength of the big demons.

In ancient times, there was a celestial dragon in the Demon Domain after stepping into the reincarnation realm, and the natal spirit treasure made of its own dragon horn was also refined into a pure yuan treasure, and its power was even comparable to the legendary ancient gods.

The strength of any bone in the Death Realm can be called a ground-level spirit treasure in any bone in its body, and this Heavenly Crocodile Bone Spear is the hardest bone in its body and refined.

After the refining of the ancient crocodile day and night, the grade of the heavenly crocodile bone spear has stepped into the heavenly level. In addition, after the fall of the ancient celestial crocodile, the demon spirit went through a long time, and in order to protect itself, it had to escape into it to form a machine spirit, in order to survive.

Therefore, its grade is among the top among the heaven-level spirit treasures.

"Tsk, I said that the demon spirit of the ancient heavenly crocodile has not turned into ashes in the long river of time, and it turned out to be hidden in the natal spirit treasure and transformed into a machine spirit."

Lin Dong, who took the Sky Crocodile Bone Spear, immediately smiled.

"You can use the method of blood sacrifice to summon the demon spirit of the ancient heavenly crocodile to fight for you, even if it is a remnant spirit, it should be able to be called a powerhouse of the three or four yuan nirvana realm."

The little mink smashed his mouth regretfully, he wanted to use the demon spirit of the ancient crocodile to restore his strength, but who would have thought that it would become the demon spirit of the crocodile bone spear.

"No need, I plan to draw out the demon spirit of the ancient heavenly crocodile and send it to you, with the help of its demon spirit, your strength should also be able to recover to the Nirvana realm."

Lin Dong shook his head unexpectedly and refused.

"Send me? Boy, you have to think clearly, pulling out the instrument spirit is equivalent to discarding most of this Heaven Rank Top Spirit Treasure, it's too wasteful. ”

The little mink's movements froze suddenly, and he looked at Lin Dong suspiciously.

"What is wasted, I'm not used to using guns, after drawing out the demon spirit, I will integrate the Heavenly Crocodile Bone Spear into the Heavenly Scale Ancient Halberd, and continue to upgrade its grade, without wasting it at all. Hurry up, or I'll regret it later. ”

Lin Dong waved his hand and said.

“...... I wrote down this love mink. ”

The little mink was slightly silent, and its claws filled with a rich purple-black glow slammed into the Sky Crocodile Bone Spear and pulled it out fiercely.

"Roar!"

In the midst of that vast beast roar, an unusually ancient behemoth suddenly swept out of the Sky Crocodile Bone Spear.

It was a blood-colored giant crocodile with a body of hundreds of zhang in size, and its whole body was covered with a thick layer of blood-colored bone armor, and the bone armor was covered with dense white bone spurs, which was simply a living war machine.

The ancient crocodile that appeared in its form had a dark sharp horn on its head, and there seemed to be an endless violent aura about to erupt in its blood pupils.

"The spirit of the Crocodile has appeared, it's time for you to get out."

Looking at this ancient xenomorph that occupied a small half of the dark realm, Lin Dong's eyes couldn't help but flash with a hint of surprise.

"Hey, look at me."

At this moment, the purple and black lines on the mink's forehead suddenly shone brightly!

"Boom!"

The entire Dark Realm shook suddenly, and a huge phantom that was hundreds of feet small quickly condensed out of the space behind the little mink.

The phantom is in the shape of a mink, with a pair of wings of weeping clouds that can cover the sky and the sun, and the rich purple-black glow is entwined, exuding a monstrous ferocity that can swallow the heavens and the earth.

Ancient and vicissitudes!

The appearance of two ancient xenomorphs suddenly filled the vast dark realm and crowded it.

"Roar!"

The ancient crocodile that sensed the monstrous ferocious aura flashed a clear look of fear in his blood pupils, and his bone spurs exploded all over his body, and he roared uneasily at the huge phantom.

That's the breath of the top overlord in the Demon Domain!

It was a terrifying power that its ancient Celestial Crocodile clan was far beyond match!

"Oh, can't the mink finally help but summon its main body?"

Seeing this, Lin Dong smiled softly, and with a wave of his robe, an incomparably strong black shield suddenly rose rapidly, enveloping Xiao Yan, who was slowly transforming.

"Come on, little darling!"

In mid-air, the Heavenly Demon Mink Phantom smiled, flapped its purple wings suddenly, and slaughtered it with that monstrous ferocious aura.

"Roar! Roar! Roar! ”

In that earth-shattering beast roar, the two ancient xenomorphs collided violently, shaking the entire space continuously.

Half an hour later.

"Heavenly Demon Devouring the Sun!"

The Heavenly Demon Mink that stepped on the huge beast body roared in the sky, and a huge purple-black vortex immediately swallowed the spirit of the Heavenly Crocodile.

"Whew!"

The phantom of the Heavenly Demon Mink, which swallowed the ancient Heavenly Crocodile Demon Spirit, immediately turned into a ghost and escaped back into the mink's body, and the little mink carrying huge power had to fall into a deep sleep immediately, without even leaving a word of explanation.

"Huh, this guy ......"

Seeing this, Lin Dong smiled helplessly, pointed his finger, and a black light mask immediately fell from the sky, enveloping the sleeping mink into it.

"Just melt the Heavenly Crocodile Bone Spear completely, and the material is integrated into the Heavenly Scale Ancient Halberd."

Lin Dong spread his palm, and a rich golden flame immediately rose into the air, completely enveloping the white jade-like Zhang Xu Bone Spear, and then licked it to his heart's content.

After stepping into the realm of the Heavenly Rune Master, the spiritual fire he summoned could directly incinerate a Creation Realm powerhouse into nothingness, and it was only time to melt the Heavenly Crocodile Bone Spear that had lost its spirit.

......

Twenty days later.

"Why is this stupid tiger still extracting the energy from the Holy Spirit Pool? Master Mink, I've been awake for days. ”

The little mink, whose body was becoming more and more condensed, propped up his chin and snorted boredly, now it is a two-element or even three-element nirvana realm powerhouse, which can be worthy of a battle.

"The longer you suppress it, the more hearty it will be, waiting."

The thin figure sitting on the side of the mink did not move at all, and his tone was flat.

"Okay, it's just that if this guy dares to break through and fail after half a month of entertaining Master Mink, I must pluck its skin and eat its meat!!"

The frustrated mink muttered discontentedly.

Another three days passed.

The crimson tiger beast that was quietly crouching in place was infected by an even more strange crimson red, and white smoke continued to burst out of its body, and even a strange crimson flame was faintly burning frantically on the surface of its body.

"Roar!"

Xiao Yan, who was sleeping, roared in pain, it was awakened by the crimson flames burning around it, and looked at these Nirvana fires that appeared at some unknown time with a look of horror.

"Tsk, this stupid tiger has accumulated so much that he actually plans to spend the first Nirvana Tribulation together and directly step into the realm of One-Yuan Nirvana."

The mink smelled the smell of Nirvana, ominous and dangerous.

"Say something cool, get out of the way, I want to help Xiao Yan."

Lin Dong glanced at the little mink angrily, and patted the Qiankun bag on his waist, and a crimson Dan river composed of pure Nirvana Dan immediately emerged, and was shattered into a rich Nirvana Qi by a soft force.

"Buzz!"

Under the control of an invisible hand, the dense Nirvana Qi that was almost substantial was piled up one after another, turning into a series of crimson dragons aimed at the tiger beasts below, scrambling down like a roar.

"Roar! Roar! Roar! ”

After receiving a steady supply of Nirvana's Qi, Xiao Yan's roar, whose whole body was entangled in Nirvana's fire, immediately became a lot louder, and it began to survive the tribulation with peace of mind after gradually stabilizing the situation.

"Next, it's up to Xiao Yan himself."

The hearts of Lin Dong and Xiao Mink hung at the same time.