Shangguan Yu'er's complaint made Lin Yun realize that something was wrong, since the exercises and divine skills in the Secret Realm Book Pavilion had been emptied, why did the Secret Realm Book Pavilion still leave such a strong formation.

Lin Yun seemed to have an answer in his heart, if this powerful formation was used to protect the magic skills, he would naturally not let people empty the magic skills in the Secret Book Pavilion. Now the formation is still there, but the divine technique has been emptied. Then there is only one possibility, that is, the formation is not a guardian magic skill!

"I understand! This formation is not for guarding divine skills! Lin Yun immediately turned around and walked towards the Secret Realm Pavilion, and a blue divine soul power shot out from Lin Yun's pupils and probed towards the Secret Realm Pavilion.

Shangguan Yu'er looked confused, "Lin Yun, did you find something?" ”

Lin Yun didn't speak, and concentrated on exploring the power of the divine soul towards the Secret Realm Library. When the blue divine soul spiritual power approached the Secret Realm Library, a powerful holy light was distributed from the formation, blocking Lin Yun's spiritual power, and it seemed that it was intended not to let Lin Yun's spiritual power approach the Secret Realm Library.

"Purple Eyes of Purple Eyes, Blue Soul Lightning!" Lin Yun burst out and blasted the power of his divine soul towards the formation.

A blue thunderbolt of lightning broke through the void and slashed towards the Secret Realm Pavilion. That formation felt the terrifying power of the divine soul, and the formation energy turned into a vajra cover, protecting the Secret Realm Book Pavilion in it, preventing the blue thunder power released by Lin Yun from penetrating the Secret Realm Book Pavilion.

With a violent impact, the blue divine soul power that Lin Yun blasted out shattered in front of the vajra cover that had evolved into the formation, and one after another coercive pressures exploded.

"What a situation! Why does the Secret Realm Book Pavilion have such an arrogant formation defense! Shangguan Yu'er asked suspiciously. Shangguan Yu'er had already felt Lin Yun's powerful combat power, and this combat power could even injure the Triple Heaven powerhouse of the Holy Realm. However, in the face of an empty book pavilion that did not have any divine skills to offer exercises, Lin Yun's attack did not work at all.

Shangguan Yu'er's face was full of wondering, as strong as Lin Yun couldn't break through the formation of the Secret Realm Book Pavilion, could it be that this formation was guarding an immortal-level treasure?

Shangguan Yu'er's mind had just flashed such a thought, and she instantly understood Lin Yun's behavior. It turned out that Lin Yun also had the same guess as himself, so he would use the Divine Soul attack to test the strength and weakness of the Secret Realm Book Pavilion formation.

The Secret Realm Book Pavilion formation shattered Lin Yun's divine soul lightning, which made Lin Yun extremely excited. Lin Yun's Divine Soul Lightning Attack attacks with spiritual power at any time, but Lin Yun's spiritual power is too strong, and it is even close to the strength of the middle level of the Holy Realm, which is also the reason why Lin Yun was able to use the purple pupil soul dementor to injure the bloodthirsty demon.

Lin Yun was unable to break through the formation defense of the Secret Realm Book Pavilion with the power of his divine soul, which made Lin Yun more confident that it must be an extremely unusual treasure within the formation, and even the power of the purple pupil divine soul could not easily break through the defense, which made Lin Yun breathe a sigh of relief.

"The wind and clouds of the Infinite Mixed Yuan Palm Technique, one palm, explode!" Lin Yun pointed at the void with one hand, and a storm and clouds were suppressed by the void. The third realm of the Infinite Mixed Yuan Palm Technique, a single palm of Fengyun Qiankun can stimulate a hundred times the combat power, making Lin Yun's explosive power exceed the trillion level. Trillion-level energy fluctuations are the same as the power of the rules of the Great Dao, and they can break mountains and rivers in an instant.

The Secret Realm Book Pavilion Formation felt the terrifying palm pressure in the void, and the Secret Realm Book Pavilion Formation immediately opened, and a light curtain protected the Secret Realm Book Pavilion.

The powerful Infinite Mixed Yuan Palm Technique fell from the void, and the terrifying divine power continued to crush the void, and the power of the powerful Dao rule bombarded the light curtain of the Secret Realm Book Pavilion.

"Boom!" The light curtain of the Secret Realm Book Pavilion continued to roar, and the entire Demon Son Battlefield trembled.

Previously, Lin Yun was worried that the Secret Realm Book Pavilion formation was too weak to withstand the attack of the Infinite Hybrid Yuan Palm Technique. At this moment, Lin Yun realized that he had encountered a hard stubble. The powerful Infinite Mixed Yuan Palm Technique slammed into the light curtain of the Secret Realm Book Pavilion with one palm.

In addition to the terrifying roar, the Secret Realm Book Pavilion Formation Light Curtain actually resisted the pressure of the Qiankun palm of the Infinite Mixed Yuan Palm Technique, without the slightest sign of breaking.

Lin Yun looked embarrassed, and he used the third realm of the Infinite Mixed Yuan Palm Technique, but he couldn't even break through the formation light curtain of the Secret Realm Book Pavilion! It doesn't matter if he can't break the Secret Realm Book Pavilion Formation Light Curtain this time, but what Lin Yun is worried about is that if he can't break through the formation light curtain, once the bloodthirsty demon head recovers the power of the Divine Yuan and is attracted by the roar again, then Lin Yun and Shangguan Yu'er will be in danger!

Shangguan Yu'er felt the same way, the power of the Qiankun palm of the Infinite Mixed Yuan Palm was so terrifying, it couldn't break through the light curtain of the Secret Realm Book Pavilion Formation, if it continued like this, this terrifying roar would definitely attract the attention of other cultivators, and even attract the bloodthirsty demon again!

"Lin Yun, I'll help you! Let's attack together! ”

After Shangguan Yu'er finished speaking, she directly pulled out the Shangguan Divine Sword without saying a word, pointed at the Secret Realm Book Pavilion Formation with one sword, and waited for Lin Yun to give the order to attack together.

Lin Yun nodded silently, for today's plan, he could only rely on the strength of everyone to break through the defense of the Secret Realm Book Pavilion formation, and he couldn't break the defense with his own strength.

"Xiaobai, prepare to attack!"

"Whew! Wait for me, I'll be there soon! Xiao Bai sent out a tiger roar towards the void, and the aura of the Great Dao Beast Yuan frantically poured into the body of the little white beast, making the size of the Holy Realm White Tiger continue to grow bigger and stronger!

"Three Thousand Worlds, Asura Dao Killing Gods!" Lin Yun waved the black knife chaotic blade in his hand, and the coercion of the Void Dao instantly condensed on the black knife chaotic blade, the divine power aura urged by the ancient famous knife was extremely terrifying, and the divine power of the entire Void Dao divine power seemed to revolve around Lin Yun's body!

When Shangguan Yu'er saw Lin Yun move, the Shangguan Divine Sword in her hand immediately burst out with a dazzling light of sword qi. A sword qi containing terrifying coercion was drawn from the Shangguan Divine Sword, and a heavenly thunder landed on the Shangguan Divine Sword with precision.

The White Tiger of the Holy Realm also burst out with a Saint Realm level tiger roar, a tiger roar sound wave turned into a shape, and the white tiger rushed down the mountain towards the Secret Realm Book Pavilion formation.

The endless black knife blades and Shangguan Divine Sword attracted the power of the rules of the Heavenly Dao at the same time, and the Demon Son battlefield was full of rolling demon clouds, and the coercion was extremely terrifying.

One after another, the divine power of heaven and earth bombarded the formation light curtain of the Secret Realm Book Pavilion, and the formation light curtain finally appeared under the three of them bursting out of the Saint Realm level combat power at the same time.

Lin Yun was immediately overjoyed, the appearance of this crack naturally meant that the formation defense of the Secret Realm Book Pavilion began to be unable to withstand the tricks of the three of them. However, Lin Yun understood that it was still difficult to make the formation light curtain break directly by relying on a crack!