Bone Lulu, Gu Lulu,......。

Due to the gravitational acceleration, the stone ball rolls faster and faster, and the sound produced by friction becomes louder and louder.

A hundred meters was a hundred meters away, and when the two demon warriors who were at the head were wondering what was making a noise, the stone ball had already rounded the corner and crashed directly into them.

"Ah......h

The demon death squad that climbed the ladder was a team of two side by side, and the distance between the front row and the back row was two steps, and when the demon warrior in front was crushed by a huge stone ball, the demon warrior behind had no time to dodge at all, and then stepped into the footsteps.

The Coiling Dragon Ladder was wrapped around the Coiling Dragon Stone Pillar like a divine dragon, and from the bottom up, 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.

By the time they finally saw the true face of the stone ball, it was too late to dodge, and they could only leave a scream like their crushed companions above.

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

That distance was not enough for the demon warriors on the ladder to dodge, so unless they took the initiative to jump down, Bi would be ruthlessly crushed by the stone ball.

In the end, the first stone ball successfully rolled out from the entrance of the Coiling Dragon Ladder on the ground, and the thousands of demon warriors who climbed the ladder were all crushed to death, and the situation that Ning Yuan was worried about that the stone ball would suddenly fly out of orbit did not appear.

Looking at the huge blood ball rolling down from the Coiling Dragon Ladder, Green's eyes immediately turned red, he clenched his fists, staring at the Coiling Dragon Ladder for a long time.

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

They looked at the stream of blood that flowed down the ladder, and they were all furious.

"Marshal, let's go back to the camp first."

Seeing that Green was motionless as if he had been immobilized, the adjutant beside him had to wake him up.

"Order the army to return to the camp for repairs."

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

......

Rolling ball is a very simple tactic that uses the weight of the ball itself and the gravitational acceleration generated when it falls.

On the Great Earth, the defenders of the city often used rolling logs and this tactic is a principle.

In many modern single-player adventure games, the huge stone ball is often designed to be used as a mechanism, and Li Jun is often crushed by the stone ball because he often plays this kind of adventure game, so after he saw the structure of the Panlong Ladder, this tactic directly appeared in his mind.

What do you say about tactics? In fact, the principle of many tactics is not very difficult, the real difficulty is whether you can think of this tactic at the right time.

The angelic clan represented by Cliff couldn't think of this tactic because Cloudsdale was their holy city, and they didn't dare to desecrate every grass and tree on it.

Ning Yuan didn't expect it because he put all his mind into fighting wits and courage with Cliff, and he rarely fought defensive battles.

The demons below Cloudsdale didn't expect it to be because they were attacking from the bottom up, and the angels in Cloudsdale had never used this tactic before, so they instinctively thought that this time would be the same as the previous ones.

......

Back at the camp, Green gathered all the generals and thinkers, and then began to study how to deal with it.

The emergence of the rolling stone tactic casts a thick shadow on the demon army's attack on Cloud City, if you can't think of a way to crack it, then as long as there are enough stone balls on Cloud City, the demon army below will not want to attack it.

"Sir, I think it's better to pin your hopes on the vampire army than to try to figure out how to solve it.

Here, too, the vampire warriors can enjoy some of the blessings of Cloudsdale, as long as they can capture the exit of the Coiling Dragon Ladder, and once our demon army rushes forward, those damned angels will never be able to make any waves. ”

Cloud City occupies the right time, place and people, and the railing of the Panlong Ladder is extremely strong, and it cannot be destroyed by manpower, so it is not easy to think of a solution to solve it.

A demon general finally couldn't stand it anymore after seeing that everyone was silent, so he took his own way and proposed another way out.

"Joseph, just do as you say, and I'll send someone to inform the Blood Thousand Blades to attack with all their might at night.

Well..., when the vampire legion attacked Cloudsdale, you sent a team of demon warriors to continue to climb the ladder, and let them sneak up in a row. ”

Seeing that no one could think of a solution, Green could only pin all his hopes on the allies.

......

There are many holes in the mushroom umbrella of Cloudsdale, and those holes are the passages for angels to enter and exit Cloudsdale.

During the day, sunlight shines through holes in the land below Cloudsdale, so the only flying class in the Demon Alliance, the Vampire Legion, cannot participate in the battle.

At night, the underside of the umbrella immediately turns into a dark world, and then a large number of black shadows fly out of the surrounding mountains.

After the 200,000 vampire legions were assembled, the Blood Thousand Blades gave an order, and countless vampire warriors flew towards Cloud City above their heads.

At the same time, a death squad of three thousand elite demon warriors also secretly climbed the Coiling Dragon Ladder again.

The hole above Cloudsdale has a diameter of tens of meters, and the small one is more than ten meters, and when the vampire warrior wants to fly up the hole, dense elven rangers immediately appear around the hole.

When the elven rangers kept pouring arrows down the hole, it immediately rained "bats" in the sky, and vampire warriors kept falling from the sky.

When some vampire warriors finally rushed forward in the rain of arrows, the Light Angel warriors who had been waiting for a long time immediately swarmed up and directly surrounded them.

The Condor Empire has a very powerful army of vampires, and Ning Yuan has used their advantage at night to carry out many raids, and he knows the strengths and weaknesses of vampires very well.

So after learning that there were vampires in the demon alliance, he had already sent people to the Golden Forest to mobilize elven rangers who were good at long-range attacks.

In order to hide people's eyes, Ning Yuan chose to use the silver pegasus and the golden-crowned griffin to transport a large number of elven rangers to Cloudsdale at the dawn of the day.

The enemy only knew that a large number of flying legions had entered Cloudsdale, and they didn't know that they were actually transporting troops, so the appearance of the elven rangers directly caught the enemy vampire legion off guard.

Blood Thousand Blades had been prepared to be ambushed by the angel legion above Cloud City before attacking, and he was ready to lose some troops to charge, but he never expected that there was an elven ranger army ambushed above.

"Order the whole army to retreat."

Holding his shoulders with arrows in his hands, and looking at the clansmen around him who fell like rain, Blood Thousand Blades gave the order to retreat unwillingly.

In the charge just now, he had the better luck to avoid the vital point, only to be shot in the shoulder by a stray arrow, otherwise he would have been one of the falling.