Gollum......

A large number of bubbles appeared in the magma under the fortress, and the Imperial army also noticed the change.

Carlos smiled, things going according to his plan.

"I've waited so long, it's finally all right, Anna, go ahead."

Carlos didn't know who he was talking to.

"Hmm."

An ethereal girl came, and there seemed to be an invisible woman near Carlos.

After about a few tens of seconds, the magma that bubbled out a lot of bubbles under the fortress stopped churning and began to solidify.

Click, click.

The magma condensed together collapsed and cracked, and these cracks were not messy, but formed a chain of large alchemical arrays.

Boom Boom Boom ......

The ground began to shake in a radius of more than a dozen kilometers.

Bang!

The solidified layers of magma burst, and in the cracks in the layers of magma, hotter magma gushes out, and those cracks gush out like fountains.

Gollum......

The lava flowed down the slope, and the Imperial soldiers who were not far from the lava immediately retreated.

The magma continued to flow high and down the slope, and in just a dozen seconds, a tumbling magma slope had formed under the fortress.

At the back of the battlefield, Carlos' adjutant stood on a high place and watched the magma break, holding a black stone slab in his arms, on which was carved a very precise alchemy array.

"The height is not enough."

The adjutant's bite muscles protruded, and he could clearly see that the lava flow under the fortress had begun to consume the Imperial Army, and the screams were continuous.

"It's not enough."

Adjutant Ronna's gaze was a little vicious, and at this moment, a large number of Imperial soldiers were being swallowed by magma.

Informing these soldiers in advance would have greatly reduced the number of casualties, and if that were to happen, there would be a high chance that the plan would be exposed, and more people would have died.

The screams of the soldiers incinerated by the magma were heard far away, not to mention the ordinary officers of the empire, and even the tribal army on the fortress was stunned.

"Carlos, madman!"

Amster, the Minotaur, twitched his cheeks, although he knew some of Carlos's ruthlessness, he didn't expect Carlos to be so ruthless, this was executing a plan with the lives of soldiers.

Gollum......

The higher the magma surges, the more lava flows down the slope, and the more casualties the Imperial army will suffer.

Soon, the tribal army on the fortress felt the scorching heat of the magma, and their beards began to scorch, and they began to retreat, and if the lava poured up the fortress, they would be dead.

Amster the Minotaur did not retreat, because he believed that no matter how crazy Carlos was, he would not let the lava pour up the fortress, and when the magma solidified, it would produce hard rock, and if the lava poured up the black earth fortress, the Tribal army would at most escape from the fortress from the rocky slope on the other side, and the casualties would not be too great.

If the magma solidifies above the black soil fortress, not to mention the damage to the overall structure of the fortress, it will be a huge project to clean up the rocks in the later stage, and then the black soil fortress will be equivalent to a kilometer of waste, and the tribal army will attack again from this weak point.

As Amster the Minotaur imagined, when the lava rushed to level with the fortress, Ronna, the lieutenant in the rear of the Imperial Army, shattered the stone slab in his hand.

With a snap, the slate shattered, and the magma surging from under the fortress stopped in an instant.

There is a reason why Carlos does not let the magma rush up to the fortress, on the one hand, the magma cools down and forms rocks that are difficult to clean, and on the other hand, if you want to kill the tribal army on the fortress, you don't need to let the magma rush up at all, which will startle the snake.

After the magma at the level of the fortress came to a standstill, Amster, the minotaur on the fortress, breathed a sigh of relief, which was exactly what he expected.

"Run!"

A small shout was heard, and the goblin inventor ran wildly on two short legs to the other side of the fortress, jumping to the other side of the tribal slope and continuing to escape.

At first, goblin inventors thought that the alchemy array inside the magma was 'hot and cold swapped for alchemy', but this was not the case.

Seeing this reaction from the goblin inventor, the Minotaur Amster's hair stood on end.

"Stand out of the fortress."

As Amster the Minotaur roared, he also ran towards the rocky slope on the other side of the fortress, but he was a little slower.

The color of the magma that has stopped gushing begins to change, from blazing red to blue-black, and a layer of ice crystals quickly clings to the surface of the magma.

With such a large alternation of hot and cold, the magma slope, which has become a semi-solid, cracks rapidly.

Laugh at!

When hot and cold are touched, a large steam rises, which is not ordinary water vapor, but superheated steam far beyond the critical point.

The steam was filling, and tonight was a westerly wind, and a large area of steam quickly enveloped the black earth fortress, and tonight was the weather that Carlos wanted most.

"Ahh

Hoarse screams rang out from the fortress, and four 'dishes' appeared on the fortress, steamed orcs, steamed goblins, steamed dwarves, and steamed trolls.

The 30,000 tribal troops stationed at the fortress roared in pain, the terrifying temperature of the steam burning their skin and eating away at their organs if they breathed.

In just a few seconds, there was a dead silence on the fortress, only a white vapour of steam, and the tribal army on the fortress was dead.

A smell of flesh wafted away, and some of the newly recruited recruits of the Imperial Army began to retch.

Silent, cruel, terrifying, this is what the Black Earth Fortress looks like now.

"Blood debts and blood repayment, the fortress built by Lao Tzu's ancestors, the tribe is not trying to take it away."

Carlos said this sentence word by word, this is Carlos, brave. Iron and blood, more ferocious than anyone at critical moments, only such people can hold the border fortress, those so-called heroes, can not keep the tribe out of the fortress, there is no word despicable in the war, as long as you can kill all the enemy troops, what can you do if you are despicable? Dead people do not say that the enemy is despicable, because they are dead and cannot speak.

The steam lasted for more than four hours before it began to thin down, and the sky began to light up.

On the battlefield, Carlos said something to the invisible woman.

At the same time, the adjutant of the rear of the Imperial Army, Rhona, ordered the regrouping of troops, and the order was quickly conveyed to the entire army.

In just a few minutes, more than 200,000 Imperial troops had regrouped, and the hesitation in the eyes of the soldiers disappeared, and the resolute gaze made one wonder if they were the half-rapped scattered soldiers who were desperately squeezing backwards a few hours ago.

Thousands of soldiers with large buckets on their backs lined up in a neat line and hurried towards the Black Earth Fortress, and when the thousands of soldiers rushed to the front of the solidified magma slope, they untied the thick bucket half a man high behind them and poured the water inside at the bottom of the slope.

Laugh at~

The water vapor rises, and the temperature of the slope gradually decreases after watering, and the surface becomes gray-black honeycomb.

Buckets of water were poured on it, the temperature of the magma slope cooled rapidly, and thousands of people gradually pushed upwards to continue watering.

After thousands of buckets of water were poured, the magma slope was still a little hot, but it was barely enduring.

Knock, knock, knock......

There was a sound of war drums from the opposite side of the fortress, it was the tribal army that was assembling, and the two sides were separated by the fortress, but there were slopes on both sides of the fortress, one side was formed after the magma was cooled, and the other side was prepared by the tribal army in advance, which was to prevent the imperial army from retaking the fortress, with this slope, the difficulty of the tribal army attacking the fortress would be much reduced.

Although the Imperial forces did not recapture the fortress, they did create a ramp that led to the top of the fortress.

In this way, the Black Earth Fortress is like a mountain, both sides can easily rush to the fortress, and now it is up to who can push the other back.