In the face of this sudden violent heartbeat, Shi Yi's face instantly became ugly, and there was no need to think about it, which was obviously a danger warning issued by the heart talisman.

And through such a violent heartbeat, Shi Yi judged that what was about to happen was very dangerous, and there was even a risk of death if he was not careful.

Thinking of this, Shi Yi immediately drew his eyes back to the battlefield, wanting to find the source of this crisis so that it could be contained in advance.

Even if the source of the danger cannot be stopped by man, it is better to know what the danger is and avoid it in advance.

The heart charm is good in every way, but the only drawback is that it is impossible to know what kind of danger this violent heartbeat portends.

However, those talismans that can predict dangerous pictures are far from the heart talisman in terms of sensitivity and accuracy, hey, it's really a difficult choice to have both.

Shi Yi thought about it while anxiously paying attention to the movements of the monks of the Yan Kingdom on the battlefield, no matter what, this imminent danger must be inseparable from the Yan Kingdom.

Thinking of this, Shi Yi suddenly had a flash of inspiration in his mind, when is the time node of this heartbeat crisis warning.

That was not long after Liu Guo attacked the fortress of Yan Country with crossbow arrows, and now the tug of war on the battlefield between the two sides is centered on these ballistas.

Just as Yanagi did his best to protect these ballistas, he was trying to rely on these siege equipment to bulldoze the fortress of Yan Province in Maruyama.

Let the entrance of the Yuanjing vein within the scope of the fortress be out of the control of the Yan Kingdom, and pull the two sides into a state of attack, instead of a difficult attack and defense.

This is Liu Guo's plan, but it is exactly the last thing Yan Guo wants to see, now that the Yuanjing ore vein is under their control, with a fortress as protection, they can slowly mine Yuanjing while guarding against Liu Guo's attack.

If the fortress is lost, it means that the mining of the Yuanjing vein can only be interrupted, and there is no fortress to hold onto, and there will be a risk of the Yuanjing vein changing hands, which the Yan Kingdom is of course unwilling to bear.

So, their first target is these ballistas.

Thinking of this, Shi Yi looked beyond the Yan Kingdom monks who were fighting and looked at the fortress in the distance.

Just as Shi Yi thought, the fortress was busy, and many huge spherical objects were placed on the walls of the fortress.

There were many of them, and they were not small, but they were dark green, and they looked more like wood than metals such as gold and iron.

Could it be that these things are the source of this crisis? Shi Yi stared at those balls and couldn't help frowning, what did the Yan Kingdom plan to do with them, did they plan to use them to launch and smash these ballistas.

Thinking of this, Shi Yi couldn't help but shake his head, feeling that this idea was too ridiculous, Liu Guo used a ballista to attack such a large fortress, using standard arrows, but it was only magnified countless times.

Even so, it is necessary to repeat the school team before he can hit the huge fortress of the Wild Goose Country.

And if Yan Guo planned to use the same method to kill Liu Guo's ballista, the difficulty would be hundreds or thousands of times higher.

Regardless of whether these strange balls in the country of Yan are accurate or not, just because the fortress and the ballista are used as targets at the same time, the difficulty of hitting is not a level.

A ballista is only a big car, and it is not ordinary to hit accurately at such a distance.

Having said that, the violent heartbeat will not be faked, and for safety reasons, Shi Yi still kept a certain distance from the crossbow cart behind him, so as not to be affected by the pond fish when the crisis broke out.

After thinking about it, Shi Yi felt that it was still not enough insurance, so he took out a Canglan talisman and slapped it on his body.

At the same time, he held the water sealing cover in his right hand and a magic talisman in his left hand, ready to deal with the situation at any time.

Just when Shi Yi was nervously responding, a roar suddenly erupted above the fortress of Yanguo, and as these sounds sounded, those dark green balls also flew into the sky, flying in the direction of Liuguo's position like cannonballs.

The monks of the Wild Goose Kingdom who were fighting obviously knew what this sound meant, and as if they had received a signal, they quickly put down their opponents who were facing the enemy, and retreated a long distance as quickly as a tide.

And those dark green balls also flew to the battlefield at this time, as Shi Yi expected, none of these balls hit the ballista, and it was really difficult to hit the ballista with a small target with these balls.

These huge balls flew straight down from the sky, some rolled into the position and brought some casualties to Liu Guo, while some simply landed directly on the clearing, and no one was hit.

In short, the balls were nothing compared to the damage done by the crossbow bolts that flew into the formation last time.

Shi Yi looked at these balls a little speechlessly, is this just an oolong, and how to explain the heart talisman.

Just as Shi Yi was puzzled, the huge dark green ball suddenly moved.

As the surface of the sphere did not break, huge waves of white air centered on these spheres and continuously sprayed outward.

The monks who were not far from the ball were pushed a little unsteadily, just when everyone thought that these white gases were poisonous gases put by the wild goose country, so they closed their breaths.

In the white gas, a strange hissing sound sounded, and in this way, in the astonished eyes of many Liuguo monks, huge monsters of different shapes broke through the cover of the white qi and appeared in front of the Liuguo monks.

These monsters are huge, some resemble beetles, some resemble snakes, and some resemble four groups of beasts.

Although they have different shapes, they all have one obvious feature, that is, the dark green color, and the wood-like texture of the body.

Shi Yi can say with certainty that these things are man-made, although he is sure in his heart, Shi Yi still can't help but be shocked.

What kind of skill did it take to make such a huge wooden device and still be able to move like a living thing?

Just when everyone was shocked, these huge monsters had already launched an attack on the Liuguo monks.

The monster that looked like a tiger stepped back and jumped into the crowd, and its huge paws trampled in the crowd, and many monks were trampled to death in an instant.

The tail like an iron hook swept away, and many monks who could not dodge were swept away, and no one could come forward for a while.

At the same time, the monk facing the beetle was no better, the beetle not only had amazing defensive ability, but also had a pair of pincers on its head that were extremely sharp, and the monk who could not avoid it was directly dismembered.

The most important thing is that after this beetle opens its back armor, it can actually fly into the sky, and when it folds its wings and falls from the sky to the crowd, it is simply a mountain shaker.

Although these monsters are all amazing, Shi Yi has no time to look at them, because the monsters in the direction of the third ballista have already met them.