Until then, Lin Xuan had figured out a problem..

It turned out that if one wanted to enter this Thunder Green Dragon Mountain, one's cultivation level was not the key. The most important thing was that there were some restrictions on this Thunder Green Dragon Mountain that prevented him from entering..

If he wanted to enter this Thunder Green Dragon Mountain, he had to remove the restrictions here first..

Therefore, Lin Xuan immediately searched around the area of the Green Thunder Dragon Mountain, looking for the location to break the lightning restriction of the Green Thunder Dragon Mountain..

The series of encounters in the Azure Emperor Mystic Realm made Lin Xuan understand one thing. There should be some formations that he could break through such restrictions as the Lightning Azure Dragon Mountain..

Lin Xuan continued to search for a while near Lightning Green Dragon Mountain. He finally found a rather strange rune stone near Lightning Green Dragon Mountain. There were many Lightning Mark runes engraved on it.

In the middle of the lightning rune, there was a circular hole..

Lin Xuan knew that the rune stone engraved with the lightning mark could not have appeared in this place for no reason..

Lin Xuan took a few steps back. After seeing the connection between the Lightning Green Dragon Mountain and this rune stone, his eyes immediately lit up..

When he walked far away, Lin Xuan realized that the lightning mark on the stone in front of him lit up. The Lightning Green Dragon Mountain also struck a bolt of lightning..

In other words, this stone engraved with the Thunder Mark controls the lightning of the entire Thunder Green Dragon Mountain..

"As expected, the lightning in this area of Green Thunder Dragon Mountain should be controlled by this rune stone. The circular hole in the middle of that rune stone should be the formation eye of the restriction of Green Thunder Dragon Mountain..

” With this in mind, Lin Xuan raised his hand again and shot out a stream of spiritual energy..

However, what Lin Xuan did not expect was that after the spiritual energy touched the lightning mark stone in front of him, the lightning marks on the stone lit up..

Moreover, the lightning rune on it had also changed from the blue light emitted previously to red..

Lin Xuan turned his head to look at the path that led up the Green Thunder Dragon Mountain. He saw a large number of red lightning pouring down like a rainstorm..

"It seems that we can't forcibly destroy this stone engraved with the Thunder Mark..

” Lin Xuan could feel that if the red lightning that poured down just now struck him, he would probably be destroyed on the spot..

At this moment, Lin Xuan couldn't help but feel his scalp tingle..

However, there were no demonic beasts in this area of the Green Thunder Dragon Mountain for Lin Xuan to kill. Therefore, it was impossible for this stone of the Green Thunder Dragon Mountain to contain the inner cores of any demonic beasts..

Looking at the stone engraved with the lightning mark in front of him, Lin Xuan fell into deep thought..

After a while, Lin Xuan suddenly thought of something..

It was the size of the hole in the middle of the Thunder Mark Stone. It seemed to be the same size as the Four Saint Orbs he had obtained before..

Lin Xuan immediately took out the Four Saint Pearls and seriously compared them..

Lin Xuan instantly understood..

"Of the five secret realms, except for Mount Lin, which is somewhat special, the other four locations seem to be guarded by four holy beasts..

” " The four saints mentioned in the Four Saint Pearls don't correspond to the four saint beasts who broke through from the Heavenly Dao Nascent Soul Stage to the Soul Formation Stage, right?" Even though Lin Xuan wasn't sure if what he was thinking was right, he felt that this was the only way he could go now..

Lin Xuan took a few steps forward and placed the Four Saint Orbs in his hand into the hole with the lightning mark engraved on it..

The moment the Four Saint Orbs were inserted into the hole of the stone, the lightning marks on the stone lit up again..

What was different from before was that this time, the lightning mark on the stone emitted a dazzling blue light..

The stone's brilliant blue light lasted only a moment before it dimmed again..

Lin Xuan subconsciously turned his head to look at the path that led to the Thunder Green Dragon Mountain..

The dark clouds that had gathered above the Thunder Green Dragon Mountain had dissipated.

The stone engraved with the lightning mark also spat out the Four Saint Pearl that Lin Xuan had just placed..

"It worked?" After Lin Xuan put away the Four Saint Orbs, he returned to the road leading up the mountain..

Out of caution, Lin Xuan finally decided to release a protective shield and use spiritual energy to activate the Art of Immobility, a protective spell..

When Lin Xuan climbed the Thunder Green Dragon Mountain again, Lin Xuan discovered that all the lightning that blocked his advance had disappeared..

Lin Xuan continued to walk forward for a while. After there was still no lightning, Lin Xuan's heart finally calmed down..

"Huff!" Lin Xuan took a long breath..

"So it seems that we are lucky to have obtained the Four Saint Orbs..

So the Four Saint Orbs are the key to removing the restrictions of the secret realm.

” Lin Xuan continued climbing for a while before arriving at the mountainside of Lightning Green Dragon Mountain..

Halfway up the mountain of Thunder Green Dragon Mountain was a piece of flat ground, which also provided Lin Xuan with a chance to rest..

Just as Lin Xuan was about to sit down cross-legged to recover some spiritual energy, he realized that there was an expressionless old man standing on the path that continued to climb..

What made Lin Xuan feel even more strange was that he could not detect any aura emitted by the old man at this moment..

Lin Xuan immediately walked towards the old man..

Before Lin Xuan could approach, the old man had already sensed Lin Xuan's arrival. He immediately stood up and blocked Lin Xuan's way.

"Little friend, may I ask who you are and why you are here?" Because Lin Xuan could not sense the old man's realm, Lin Xuan cupped his hands to the old man and respectfully said,"My name is Lin Xuan. I came to explore the opportunity to break through from the Heavenly Dao Nascent Soul Realm to the Soul Formation Realm.".

” "It turned out to be for a breakthrough..

” The old man nodded at Lin Xuan and prepared to make way for Lin Xuan..

Just as Lin Xuan was about to continue walking, the old man suddenly remembered something and stopped Lin Xuan again..

Lin Xuan looked at the old man in front of him in confusion, but he heard the old man say with a serious expression," I am the priest guarding this Green Thunder Dragon Mountain. I almost forgot that our Green Thunder Dragon Mountain has a rule. If you want to continue climbing the mountain, you must pass my test..

” " What test?" Lin Xuan asked in confusion..

The old man did not answer Lin Xuan's question. Instead, he raised his hand and launched an attack at Lin Xuan..

Lin Xuan's figure immediately retreated rapidly. A few bolts of lightning fell from where he was standing earlier..