The last ancient mine is located near the headquarters of the Demon Castle, which can be described as the Longtan Tiger's Den, and that ancient mine is also the largest vein that produces Canglong blood crystals, and tens of thousands of Canglong blood crystals are mined every year.

Yi Tian also knew the danger of the headquarters of the Demon Castle.

Even he wasn't much sure that he would be able to enter the Demon Castle headquarters unharmed, and even in danger of dying.

Therefore, Yi Tian did not go to the headquarters of the Demon Castle in the first place.

He found a secluded place and began to cultivate, restoring all the injuries on his body to the peak, and also spent a large number of divine crystals to replenish the origin of his world, reaching an unprecedented peak.

If Yi Tian absorbs the energy from the Earth Element Realm and the Wind Element Realm to restore his world, it will take at least tens of thousands of years.

Even so, it took Yi Tian twelve years to return to his peak form.

"The Last Battle!"

Yi Tian's eyes flashed with a hint of coldness.

The battle at the headquarters of the Demon Castle would be his last battle in the Blood Sky Domain, and it would also be an extremely dangerous battle.

The ancient mine in the headquarters of the Demon Castle is famous in the Blood Cang Domain, and it is one of the oldest ore veins, and it is said that it is the burial place of the head of the half-step sacred Canglong, and it still contains the slightest trace of Canglong's power.

Therefore, the ancient mine at the headquarters of the Demon Castle is also a treasure place where the major forces are most fiercely contested.

The fact that the Demon Castle was able to occupy the oldest ancient mine was definitely amazingly powerful, and it had a background that was feared by all forces.

Yi Tian sat on the red pupil golden bull, a golden light pierced the sky, and after a few days, he finally saw the headquarters of the Fierce Demon Castle, the undulating sacred mountains in the distance, the thousands of temples, and the divine towers to suppress all parties. Hundreds of millions of divine radiances are intertwined, like a sacred pure land, not as notorious as the outside world at all.

The Flame Demon Castle is intertwined with sacred mountains and divine towers, and it is arranged into an incomparably mysterious and huge divine array. This great array was not much worse than the great array of their human race, this was a heaven-level divine array.

Yi Tian saw this scene, although he expected it, but he couldn't help but be shocked when he saw the situation in the Flame Demon Castle.

The divine array between heaven and earth can be divided into four levels, the heaven-level divine array is the highest and the most mysterious, and it can manipulate the power of heaven and earth around it to maintain its operation, endlessly, as long as it is not destroyed. It can always exist without any flaws, unless it is forcibly broken by an external force, or the formation is destroyed internally to be able to destroy the heaven-level divine array.

The foundations of the major races and the forces of all parties are guarded by the Heaven-level Divine Array.

The earth-level divine array is second only to the heaven-level divine array, it can extract the power of the earth to continuously maintain the operation of the large array, and it is also very powerful, but the flaw is that once the power of the surrounding earth is cut off by the great power. The ground-level divine array will be self-defeating.

Xuan-level, yellow-level divine array. It's even more simple, you can use a little bit of the power of the heaven and earth formation, use the artifact, and the spirit treasure as the formation base to form an independent formation field, which can be illusioned. Trapped, killed!

On the land of eternity, the vast majority of the realms opened up by some god emperors were earth-level divine arrays, covering the entire realm, which was the top-level earth-level divine array. It was even more powerful than some heaven-level divine arrays.

The Heavenly Rank Divine Array at the headquarters of the Fierce Demon Castle was even more powerful than the ordinary Realm Great Array, and the Great Array composed of three hundred Divine Mountains and thousands of Divine Towers was definitely comparable to the defense of some second-rate race holy lands.

The Fierce Demon Castle actually arranged a heaven-level divine array, which surprised Yi Tian very much.

You must know that the heaven-level divine array is incomparably mysterious, and only the supreme with an unfathomable realm can be easily arranged, even if there are many god emperors, their realm is insufficient, and the arranged divine array cannot fit perfectly with heaven and earth, exerting all its power without any defects.

Yi Tian knew that it was not that the Flame Demon Castle had a heaven-level divine array and had a supreme in charge.

Although many powerful forces did not have the Supreme, they could ask the Supreme to arrange the Heaven-level Divine Array at a great cost, which was not uncommon in the land of eternity.

However, this also hints at the strength of the Blazing Castle's heritage.

"I'm afraid this battle will be very difficult!"

Yi Tian saw that at the headquarters of the Fierce Demon Castle, hundreds of imperial avenues were overwhelming, a piece of gold, and tens of thousands of royal avenues were overwhelming, although they were a lot shorter than the imperial powers, they were also majestic.

Even if Yi Tian was prepared, this time it was a killer feature, but when he saw the true essence of the Demon Castle, he was still shocked.

The last and largest entrance to the Ancient Mine of the Flame Demon Castle was in the Heavenly Divine Array, which could be said to be impregnable.

Although the heaven-level divine array in front of him is not top-level, once it is fully opened, even if it is even more terrifying than the top-level god emperor, the god and demon emperor who is still one step away from the supreme may have to spend a lot of effort to break it.

The side of the Flame Demon Castle already knew the strength of Yi Tian's side well.

Yi Tian, the red-pupiled golden bull is the only thing they have to pay attention to, and the rest of the human race is not worth mentioning.

However, they did not take the initiative to kill.

They suffered a big loss in front of the Red Pupil Golden Bull, in addition to the top God Emperor, even the high-level God Emperor alien race was accidentally incinerated by the top golden flame of the Red Pupil Golden Bull, the golden flame of the Red Pupil Golden Bull was too domineering and terrifying.

They can't help the Holy Spirit of the Red Eyed Taurus at all.

In addition, Yi Tian's incomparably strong body also made the Fierce Demon Castle's side feel tricky, and the second-in-command of the Fierce Demon Castle, the top god emperor of the Three-Eyed Golden Clan, was unable to kill him.

Therefore, the side of the Flame Demon Castle decided to wait for the rabbit and wait for Yi Tian to enter the cage, perhaps, as long as the heaven-level divine array can kill Yi Tian and the red pupil golden bull.

The heaven-level divine array at the headquarters of the Fierce Demon Castle has not yet been opened, and the side of the Fierce Demon Castle will only urge the divine array after Yi Tian comes in, and wipe out Yi Tian and the Red Pupil Golden Bull.

It's just that they couldn't have imagined that when Yi Tian first saw the headquarters of the Fierce Demon Castle, he had already discovered the clues of that heaven-level divine array.

Yi Tian once felt the evolution of the universe, the mysterious avenue, although the harvest was not too much, but the vision was comparable to many supremes, the perception was extremely keen, and the mystery of the interconnection between the heaven-level divine array and heaven and earth was understood by him at a glance.

In this regard, Yitian did not flinch.

He rode the red-pupiled golden bull, stepping on a golden light through hundreds of millions of miles, and descended on the headquarters of the Fierce Demon Castle in an instant.

"Open the Yin and Yang Reversal Heavenly Array!"

A loud voice echoed throughout the Castle.

In an instant, the sacred mountains and towers on the earth rushed out of the monstrous divine light, and the heavens and the earth turned and the stars moved in an instant, and Yitian suddenly appeared in a boundless chaotic world.

This world is chaotic, not divided into up and down, left and right, like the Hongmeng space where the world has just opened.

This is a formation realm evolved from the power of heaven and earth by a heaven-level divine array, unless someone forcibly breaks through this world, it can only be trapped here forever, or be bombarded and killed, refined. (To be continued.) )