Stirring, tumultuous,......

Due to the gravity acceleration, the stone ball rolls faster and faster, and the sound generated by friction is getting louder and louder.

The distance of one hundred meters arrived in an instant. When the two demon warriors at the forefront were wondering what was making a sound, the stone ball had already bypassed the corner and directly hit them.

"ah......."

The demonic death squad that climbed the ladder was a group of two people standing side by side. The distance between the front and the back row was two steps. When the demon warrior in front was crushed by a huge stone ball, the demon warrior behind had no time to dodge, and then walked into the footsteps.

The Panlong Heavenly Ladder wrapped around the Panlong Stone Column like a divine dragon. Looking from bottom to top, nothing could be seen, so the demon warriors below didn't know what was going on above. They just heard the screams of their companions.

When they finally saw the true face of the stone ball, it was too late to avoid it. They could only leave a scream like those crushed companions above.

In order to maximize the killing effect and achieve a perfect start, the first stone ball Ning Yuan chose was only ten centimeters smaller than the width of the Panlong Heaven Ladder.

That distance is not enough for the demon warriors on the ladder to dodge, so unless they jump down on their own initiative, Bi will be ruthlessly crushed by the stone ball.

In the end, the first stone ball rolled out from the entrance of the Panlong Heaven Ladder on the ground. Thousands of demon warriors who climbed the ladder were crushed to death. The situation where Ning Yuan was worried that the stone ball would suddenly fly out of the track did not occur.

Looking at the huge blood ball rolling down from the Panlong Heavenly Ladder, Green's eyes immediately turned red. He clenched his fists and stared at the Panlong Heavenly Ladder for a long time, speechless.

Not only Green, but all the demon warriors near Panlong Ladder were stunned by the tragedy that happened in front of him.

They all looked at the blood stream flowing down the ladder, and they were all angry.

"Master, go back to the camp first."

Seeing that Green was as if he had been imposed on his body, he remained motionless, the adjutant beside him had to shout to wake him up.

"Sent to the army to return to the camp to repair."

Although he was full of reluctance, Green would not send troops to the ladder until he found to crack this kind of rolling ball tactic.

......

Rolling ball tactics is a very simple tactic that uses the weight of the sphere itself and the gravity acceleration generated when it falls to kill enemies.

On the earth, the wooden rolling tactics often used by the defenders of the city are the same principle.

In many modern stand-alone adventure games, huge stone balls are often designed to be used as mechanisms. Because Li Jun often plays this type of adventure game, he is often crushed by stone balls. So after he saw the structure of the Panlong Ladder, this tactic appeared in his mind.

How to say tactics? In fact, the principles of many tactics are not very difficult. The real difficulty is whether you can think of this tactic at the right time.

The angel clan represented by Cliff did not expect this tactic because Yunzhongcheng is their holy city, and they dare not desecrate every grass and tree on it.

Ning Yuan could not have imagined that it was because he devoted all his thoughts to fighting wits and courage with Cliff, and he rarely played defensive battles.

The demons under Yunzhong City could not have imagined that it was because they were attacking from bottom to top, and the angels in Yunzhong City had never used this tactic, so they instinctively thought that this time would be the same as before.

......

After returning to the camp, Green gathered all the generals and think tanks and began to study solutions.

The emergence of the rolling stone tactic casts a thick shadow on the demon army's attack on Yunzhong City. If you can't think of a solution, then as long as there are enough stone balls on Yunzhong City, the demon army below will not be able to attack.

"Master, I think it's better to put your hope on the vampire army than to think about solutions.

Here, vampire warriors can also enjoy some blessings from Yunzhongcheng. As long as they can capture the exit of Panlong Ladder, when our demon army rushes up, those damn angels will never be able to make any waves."

Yunzhongcheng occupies the right time, place and people. In addition, the railings of Panlong Heaven Ladder are extremely strong and cannot be destroyed by human resources, so it is not easy to think of a solution.

After seeing everyone silent, a general of the demon clan finally couldn't stand it anymore, so he took a unique approach and proposed another way out.

"Joseph, just do what you said. I will send someone to inform Xue Qianren to launch his attack with all his might at night.

Well... When the Vampire Legion attacked Yunzhong City, you sent a team of demon warriors to continue climbing the ladder, letting them sneak up one by one, one by one."

Seeing that no one could think of a solution, Green could only place all his hope on the Allies.

......

There are many holes on the mushroom umbrella surface in Yunzhongcheng, and those holes are the passages for angels to enter and exit Yunzhongcheng.

During the day, the sunlight shines through the holes on the land below the Yunzhong City, so the only flying army in the Demon Alliance cannot participate in the battle.

At night, the dark world immediately became under the umbrella, and then a large number of black shadows flew out from the surrounding mountains.

After the 200,000 vampire legion was assembled, Xue Qianbian gave the order, countless vampire warriors flew towards Yunzhongcheng above their heads.

At the same time, a suicide squad composed of three thousand elite demon warriors once again secretly climbed the Panlong Ladder.

The holes in Yunzhong City have a diameter of dozens of meters and a small one of more than ten meters. When the vampire warriors wanted to fly up the hole, dense elves rangers immediately appeared around the hole.

When the elf rangers kept pouring arrows in their hands down the hole, "bats" rain immediately fell in the sky, and vampire warriors kept falling from the air.

When some vampire warriors rushed up in the rain of arrows, the Angels of Light, who had been waiting for a long time, rushed forward and then surrounded them and killed them directly.

The Condor Empire has a very powerful vampire army. Ning Yuan has used their advantage at night to carry out many raid missions. He is very familiar with the advantages and disadvantages of vampires.

So after learning that there were vampires in the Demon Alliance, he had already sent people to the Golden Forest to mobilize elf rangers who were good at ranged attacks.

In order to cover up, Ning Yuan chose to use the silver Pegasus and the golden-crowned griffin to transport a large number of elf rangers to Yunzhongcheng when the sky was dawn.

The enemy only knew that a large number of flying corps had entered Yunzhong City, and did not know that they were actually transporting troops, so the appearance of the elf ranger directly caught the enemy vampire army off guard.

Before the attack, Xue Qianbian was ready to be ambushed by the Angel Legion above Yunzhong City. He was also ready to lose some troops to rush forward, but he never expected that there was an elf ranger army that restrained them.

"Sent to the entire army to retreat."

Covering his shoulders with arrows and looking at the tribe members around him who were falling like rain, Xue Qianrenxin gave the order to retreat unwillingly.
Chapter completed!