Lin Feng was immediately shocked, this scene in front of him was not caused by an illusion, but a real existence, but the formation attainment could not reach a certain level, and they couldn't see through this mystery at all, they would think that this was still a virtual image of the phantom array, so they walked into the basin valley without any scruples!

But in fact, the basin valley in front of him is not a phantom array, but a powerful killing array hidden in the phantom array, these spherical boulders floating around, each of them weighs more than ten thousand pounds, once the monks who enter the killing array reach a sufficient distance, the prohibition of the killing array will be activated, and the boulders near the body will be surrounded by thunder, and the monks trapped in it will definitely have no bones!

The most terrifying thing is that the boulder killing array is hidden in the phantom array, even if the monks in front are attacked, or even killed, the monks in the rear can't see it at all, the roar of the boulder will cover all calls, the shadow of the dense fog can obscure the divine consciousness, and the monks in the rear will be hit into scraps of meat by the boulders in the killing array without realizing it!

Lin Feng stood at the edge of the basin valley, looking back at the Yidaomen people who were still behind them, they were exploring around in the trapped formation, the crowd had already dispersed, but after all, the canyon had limited space, and they would still come here in the end, but the time spanned, so it was even more difficult to find the danger ahead, even if there were countless fellow disciples who died in it, they would not be able to detect it, but would go forward and fall into it!

The four great ancestors of Yidaomen, under the guidance of Bai Yiyi and Zi Jiuqing, were also gradually approaching the basin valley, Lin Feng had already concluded from the pace of Bai Yiyi and Zi Jiuqing that the formation skills of these two people were not very good, and it was even more impossible to see the flaws in the boulder killing array in front of them.

This boulder killing array was originally set up by Yihongmen and Qinghuomen to prevent the Demon Sect, but now it has become a nightmare for Yidaomen, and those who can forcibly pass through this killing array, except for the four great ancestors, the rest of the disciples will be wiped out!

Lin Feng intended to prevent this tragedy, but he had no good plan, if he openly and honestly told Mo Dongyu that there was a huge killing array in the basin valley ahead, it would undoubtedly expose his own formation skills, and the Yidao Gate was about to take refuge in the Yanxiao Palace, and then enter the endless battle, the disciple who was proficient in the formation path,

It was bound to be sent to the most difficult place to help the Yidaomen charge, although he would receive a huge reward for this, but for Lin Feng, any huge amount of spirit stones and cultivation materials were not worth his endless energy for this, and he would have to be in danger from time to time, and suffer from the jealousy of other disciples.

Mo Dongyu's four great ancestors were about to approach the basin valley soon, Lin Feng had to quickly hide aside, and a moment later, under the leadership of Bai Yiyi and Zi Jiuqing, the four great ancestors finally approached the entrance of the basin valley, and after seeing the countless boulders in front of them, their brows furrowed extremely vigilantly.

"How can there be so many boulders?" asked Mo Dongyu with some concern.

Bai Yiyi and Zi Jiuqing glanced at it for a few moments, then shook their heads and said: "There is no spiritual power fluctuation on the surface of the boulder, which means that they are not entrusted by external forces, but such a heavy boulder, without the support of spiritual power, it is impossible to swim in mid-air, so this should be just some illusion used to confuse our vision and make us unable to find a way out in the chaos of stones." ”

The four great ancestors will be suspicious, Bai Yiyi and Zi Jiuqing are quite confident standing at the entrance of the basin valley, waiting for Mo Dongyu's order, then rush into the valley to take the lead, as long as they can get through this formation, they will naturally get the favor of the four ancestors, and they will be rewarded for this, or they will be entrusted with important tasks.

Mo Dongyu was hesitating, and there was a sudden sound of fighting in the open valley in the distance, the attack of treasures and spells shook the heavens and the earth, and the forces of the Setsun Sect had reached beyond the Sunrise Valley, if the Yihong Gate and the Green Camel Gate could not stop them, the entire valley would soon be filled with the Shili of the Setsun Sect, and the Yidao Gate would definitely be affected.

"Hurry up! This place is connected to the Sunset Valley, and only by walking out of this valley can you get rid of the war between the Dao Sect and the Demon Sect. Mo Dongyu finally made a decision.

Bai Yiyi and Zi Jiuqing then took the lead in entering the basin valley, the four ancestors followed, those boulders in the distance were faintly visible, behind the huge stone body, there was an unknown space that could not be seen through by the divine sense, and countless boulders slowly drifted, forming a faint overlapping shadow in the distance, making it impossible to distinguish whether it was true or false.

Lin Feng hid on the side of the basin valley, and witnessed the four great ancestors walking into the distance with Bai Yi and Zi Jiuqing, the power of the boulder killing array might not be enough to kill the Yuan Infant Stage cultivator, but if he didn't know the method, he would be trapped in the killing array for too long, and his mana would definitely be greatly damaged, and he would even be seriously injured by the boulder.

As soon as the four great ancestors entered the formation, they were covered by the sudden wind and mist, and at the same time, those boulders gradually formed an encirclement trend, as they continued to go deeper, the smoke had completely submerged them, and from the position where Lin Feng was standing, they could no longer be seen.

And the boulders in the magic circle also sounded a huge roar at this time, and when the four great ancestors realized that these boulders were not illusions, but contained extremely powerful killing machines, they could no longer retreat.

Lin Feng had already seen through that the reason why there were no spiritual power fluctuations on the surface of the boulders, and they could still float quietly in the air without falling, was because their interiors were refined into a special cultivation material: Magnetic Twilight Stone!

According to the preset of the refining method, the spiritual power can be repelled or absorbed to its surface, so that the boulders in the magic circle can collide and float under the action of magnetic force, and the spiritual power on the surface will change direction because of this, creating the illusion that there is no spiritual power fluctuation!

The most important thing is that ordinary monks don't know about the magnetic twilight stone and the refining method of the magnetic twilight stone, and even in the Bailing Bamboo Slip and the Xuanji Treasure Book, the magic circle refined by the magnetic twilight stone is unknown, but it is still easily seen through by Lin Feng, the reason is only that his divine sense can see through it, and he can see the invisible magnetic lines existing on the surface of the boulder, as well as the fragment of the left path trickery in his hand!

The refining method of the Magnetic Twilight Stone was indeed a thaumaturgy encompassed by the Left Dao Tricks! Most monks had never heard of it at all, let alone knew anything about it, but it actually appeared in the Sunset Valley, Lin Feng had to be very surprised by this!

Bai Yiyi and Zi Jiuqing's formation attainments can't even be identified by the boulder killing array, let alone the magnetic twilight stone that exists in it, and this is where the power of the boulder killing array lies, the magnetic twilight stone will have an incredible huge collision according to the changes in the spiritual power within the magic array, and those monks entering the killing array will undoubtedly trigger spiritual power fluctuations!

Not long after the four ancestors stepped into the magic circle, they had already entered the core of the killing array, the boulders on the periphery were neutral, and the magnetic stones inside only maintained the drift and circulation of the boulders, and there would be no violent collisions, completely just confusing the foreign monks, but the countless boulders in the inner layer of the killing array had already been running like a sea of mountains at this time!

The dense fog obscured his divine sense, and Lin Feng could only hear the violent collision sound outside the formation, but the sound was empty, and it sounded far away, it must have been the dense fog that absorbed and weakened the sound of the impact, and its purpose was still to confuse the foreign monks and make them enter the killing formation without any scruples!

And at this time, the disciples of the Yidaomen who were trapped in the phantom array in the canyon were also guided by the faint sound of impact in the basin valley, and constantly moved closer to the valley mouth, but the number of people was extremely scattered, and the valley mouth spanned up and down too high, even if they arrived at the basin valley at the same time, they often passed by, entered the basin valley from different heights, and then fell into the catastrophe in the killing array!

Lin Feng was still hiding in the shadows and frowned, Yi Dao Sect was currently the only shili he could rely on, if it fell apart, and he was still in the battle zone between the Dao Sect and the Demon Sect, it would undoubtedly be extremely unfavorable for Lin Feng.

However, if he wanted to save the Yidao Gate, he had no way to start, Lin Feng could only watch as the monks continued to enter the boulder killing array, and then suffered a brutal slaughter behind the undetectable fog area and boulders, but he was really powerless to stop it.