Although Chu Hao was also only a junior formation master, he could easily arrange a fourth-level formation, and he knew that his current level was close to that of an intermediate formation master, and this lightning array was just handed over to him for experiments and research.

There was also a defensive array in the center of the lightning array, and Chu Hao would not be an idiot enough to break such a composite formation, because the only way to break the formation was to wait for the formation attainment to be high, and there would naturally be various ways to crack it.

Chu Hao is now only one step away from the fifth-level formation arrangement, if he can improve at this time, he may be able to barely crack this lightning thunder array and enter the grass house.

Originally, Chu Hao's purpose was just to break the formation, but in the process of studying the lightning array, he was unconsciously immersed. The cultivation of the formation was already a test of comprehension, and Chu Hao's mind was difficult to extricate himself after being immersed, as if he had been shocked by the mysterious and incomprehensible principles in the lightning array.

Time passed like this, after studying the lightning array, Chu Hao found that maybe the lightning thunder array was really an ancient formation, and now they all paid attention to the direction of the formation flag, but the ancient formation paid more attention to the direction of heaven and earth, if the direction was found better, it could add several percent of the power to the formation.

A place like this lightning array should be a place with abundant thunder attributes, which belongs to a naturally formed formation. In fact, Chu Hao had doubts before, after all, although he had heard of the name of the compound formation, it probably would not appear above the middle and low-level formations, at least it was also a field that the grandmaster-level formations could only set foot in, and it was more difficult for the intermediate formations to be arranged than the high-level, because the high-level formations already had a certain heaven and earth principle, and the heaven and earth could be used to arrange the compound formations, but the intermediate level could not do it, so it was even more difficult.

And there is also a defensive formation in this lightning array, before Chu Hao and Fu Rong and more than thirty of them joined forces to attack several times, not only did the others not see what it was, but Chu Hao also did not see it.

But this did not affect Chu Hao's speculation about it, if this lightning thunder array was not arranged by the top formation master, it was naturally formed and belonged to a natural formation.

There are no traces of man-made formations in the natural formation, which is of great help to the formation mage's learning and copying. After discovering this, Chu Hao was even more pleased, he had never had much time to study the formation, and now that he was given this opportunity, where would he let it go.

Unconsciously, more than a month had passed since Chu Hao entered the Bodhi Cave. Chu Hao didn't remember how long it was, he only knew that when he woke up from that mysterious state, his heart was full of joy.

Picking up a few pieces of gravel on the ground, Chu Hao threw them towards the lightning array.

There were a total of four pieces of gravel, the largest of which was no more than the size of a palm, and Chu Hao threw out different positions and entered the range of the grass house lightning array. Unexpectedly, the situation that there would be a thunder arc when entering the lightning array area did not appear, and the four pieces of gravel actually stayed on the ground unharmed.

And so it was. Chu Hao's face showed a smile, after this period of research, although his comprehension was not enough to thoroughly understand an ancient formation of about six levels so quickly, at least he had found a few blind spots in the lightning array!

This is a fatal help for him to enter the lightning array and walk towards the grass hut!

However, Chu Hao also knew in his heart that if he didn't have the book "Encyclopedia of Formations" in his hand, it would definitely be impossible for him to know the principle of the lightning array so quickly, not to mention that he had studied for more than a month, even if he had studied for a year, he would not have such results.

He had to thank the fat man Wu Lang of the Double Heaven in his heart, without the "Formation Encyclopedia" he gave him, he would never have had the opportunity to enter the grass hut now, there was no chance at all.

The four stones that were thrown by Chu Hao were not attacked by the thunder arc, and Chu Hao knew that he already knew the four blind spots. But he didn't dare to enter now, after all, the range of the four stones was too close to the entrance of the lightning array range, Chu Hao pondered for a while, and threw out the four stones again.

The four stones stopped at the front of each of the four stones in front of them. And this time, there is still no lightning arc attack. Judging from Chu Hao's approach, he wanted to use this to pave a way, as long as the blind spot where the stones were thrown could lead smoothly to the grass house, then he approached cautiously along that road, and this lightning array would be self-defeating.

But the blind spot of the formation is not so easy to find, especially for large formations, one mistake will be doomed, and it is likely to be trapped by the formation or even killed by the attack formation.

Of course, Chu Hao would not be so arrogant, after he threw out eight stones one after another, after a period of pondering, he threw out four again. Only this time, a stone had just fallen to the ground, and a lightning bolt struck from the direction of the grass hut, and with a crisp sound, the stone turned directly into powder.

This thing is not as good as Fu Rong's probing treasure, at least it is still a treasure, and this is just an ordinary natural stone, and it is normal to shatter. Chu Hao immediately gave up that path, obviously the blind spot of the correct formation was obviously not there.

As for the work of throwing stones, Chu Hao pondered for a while, threw it out for a while, and when Zuihou threw it to one hundred and thirty-eight, it was finally another line that was destroyed by the lightning arc.

At this moment, the two routes are already less than ten meters away from the grass hut, and Chu Hao has already begun to get nervous at this moment, if the remaining two roads are not good, then he may not have a chance to enter the grass hut. At this time, he couldn't make the slightest mistake, and every time Chu Hao thought about the route in the rest of the time, he would think for half an hour.

Eventually, the two stone-paved roads were gradually approaching the thatched hut, and finally less than five meters remained!

Chu Hao's palms were already overflowing with sweat, but he didn't know that at this moment, he seemed to have fallen into a state of selflessness, and his mind was tense all the time. And maybe he didn't feel it himself, but during the time he was looking for the blind spot, his understanding of the formation improved a lot.

Bang -

When Chu Hao threw out the two stones again, another thick thunder arc like a big tree fell directly from the sky, not only completely shattering the stones, but even making a deep pit on the ground!

The closer to the thatched hut, the more powerful the thunder arc became, which had been proved by the reckless progress of the Northern Heavenly Book before, and the shattering of this stone made the entire ground seem to shake.

Chu Hao's eyes were firmly fixed on the stone path below the thatched hut.

At this moment, there is only one of the four blind spots that he originally arranged from the beginning, and now there is only one left! and it is the most critical one, once successful, it not only means that he can enter the grass hut, but also means that his understanding of the formation will be on a higher level!

"Whew-"

Chu Hao took a deep breath, this time he had been thinking for a longer time, and it took about an hour before a stone fell. What others didn't know thought Chu Hao was playing Go with someone. To be honest, Chu Hao's current situation is more tiring than that of a day of chess with people, and his spirit is more concentrated.

The arrangement of the formation and the blind spot are too draining, if you can't concentrate, Chu Hao can't find the blind spot at all. Now counting the distance, it may be less than a person's walk to the grass hut, and there are only two stones needed at this time, if it can be done, it will be done!

Chu Hao threw the first piece out, only to see the stone roll forward along the safest blind spot route, and Zuihou stopped at the forefront. - Safe and sound!

Chu Hao breathed a sigh of relief, but the next moment, his heart tightened again, because he was left with a stone to judge!

He frowned, and this time he stopped squatting, and after standing up and making a circle around the periphery, and after more than an hour of thinking, he finally threw the stone, this time not in a straight line, but about an inch away from the front.

The stone slowly swiped forward with Chu Hao's heart, and after a short stay, it finally fell to the position that Chu Hao wanted to fall to the most.

Be quiet!

The whole thatched hut was surprisingly quiet, there was no movement, no thunder arc attack, no earth-shattering thunder roar!

It worked!

Chu Hao was overjoyed in his heart, activated the spiritual power barrier, and immediately dodged and flew towards the front along the road paved with stones in the blind area. Chu Hao's speed was very fast, and he was a little cautious, but after he stepped into the range of the grass hut without danger, the thunder arc did not rush out, and the lightning array was not triggered at all!

Whew――

Chu Hao exhaled, when he stood in front of the grass hut and turned his head again, his heart was full of pride at this moment! And he suddenly felt a warm current in his heart, he knew what it was like, the formation realm that he had been in the bottleneck had been improved after he broke through the lightning array!

Intermediate Formation Master!

In the past, Chu Hao could arrange a fourth-level formation, which was only one step away from a fifth-level formation, but now after lifting and studying the lightning array, he finally broke through!

He has the "Encyclopedia of Formations", which means that as long as there are enough materials and formation flags, he can arrange a fifth-level formation!

In the Six Heavens, there are definitely few intermediate formation masters, and there may not be any formation masters!

Chu Hao cleaned up his mood, and after approaching the thatched hut at this moment, he began to really observe the thatched hut up close, and when he saw the appearance of the thatched hut, he was stunned again.

Because he suddenly found that the whole thatched hut couldn't be entered!

There are no windows at all, let alone doors!

However, there were powerful formation prohibition fluctuations around the grass house, at first Chu Hao thought it was brought by the lightning array, but when he got closer, he found that it was not at all! These formation prohibition fluctuations were very scattered, and the types were not the same, when Chu Hao carefully observed the lines carved on the walls of the grass house, his face showed joy again!

These things may not be useful to the Broken Knife Mountain Villa and the group of monks in Cloud Mountain, and even if they are obtained by the Northern Heavenly Book, they will not have any substantial improvement in their strength. But for Chu Hao, it is a priceless treasure!

Because this is carved with formation patterns, the formation patterns that every formation mage is very eager for!