Ice Breath is a first-level ice spell that can be mastered by any low-level magic apprentice, but the power is very weak, even if it is blown on the goblin, it can only make him covered in a layer of white frost, but it is definitely not fatal.

However, as a spell with very low lethality, Breath of Ice also has the advantage of having a relatively large coverage and increasing power with the amount of mana entered.

20 tons of heavy artillery shells, 8 tons of shells, 12 tons of magic dust and other energy substances.

Although it is impossible for the magic array on the shell to convert all the mana into the mana of the Breath of Ice, it can convert about half of it.

Such a huge amount of magic power, after all of it was transformed into the simplest breath of ice, it immediately produced a terrifying effect, and the white cold air directly blew across a radius of 1,500 meters, and the lethality was even close to that of silver spells.

But don't forget, all the creatures in the magma are fire elemental creatures, whether it's the magma dragon, lava giant, or fire elemental, they are the most afraid of ice spells.

According to the principle of attribute restraint, the purer the fire class, the higher its own temperature will be, and the greater its resistance to fire at this time, and it can even achieve most fire immunity, but at the same time, when you bear the ice spell, the more damage you will receive.

Therefore, for these fire-based lifeforms, even if the ice spell with a lethality of less than the silver level falls on them, then the lethality will definitely exceed the silver level, and even reach the gold level.

In short, within a radius of 1,500 meters from the landing point of the heavy artillery, the snow-white frost air swept through everything, and most of the fire-based troops died next to each other, and only a few gold-level fire-based troops carried a section.

And the most important thing is that after withstanding such a cold breath, the originally rolling magma cooled down in an instant.

Although the temperature of these cooled black rocks is still hot, they have all withdrawn from the flowing magma state and become literal stones.

With wave after wave of heavy artillery falling, the surging magma tide was instantly contained, and one black reef after another appeared, greatly hindering the flow of subsequent magma.

Of course, the amount of magma behind them is extremely large, and given enough time, they can still melt these rocks back into magma, or even simply flow over them without any problems.

But the problem is that the super cannon in Emperor Shitian's hand has never stopped, one cannon after another.

A wide range of Ice Breath spells burst out in the magma area, not only creating a continuous stream of black rocks, but also cooling those hot rocks again when the drop point repeated, making it more difficult to melt.

In this case, the terrifying army of the Lava Lord Tagner was instantly stopped from attacking, at least his terrifying magma offensive was over, as long as the super cannon was still firing, the magma didn't want to go one step further.

Faced with such a situation, the lava lord Tagner was extremely angry, but there was no good way, after all, people fired cannons from 300 kilometers away, and the ordinary troops in his hands could not have such a long range.

As for dispatching the legendary powerhouse, hehe, is there a difference between it and looking for death?

The legendary powerhouse is not invincible, and if he single-handedly fights tens of millions, or even hundreds of millions, of troops on a defensive line on the opposite side, he must have no return to the end of the meat bun beating the dog.

Of course, if the Lava Lord Tagner is ruthless enough, he can also order his troops to move forward, although the super cannon can completely block the slow-moving magma with its terrifying killing range, but it is impossible to block the opponent's fast-moving troops.

Especially those fire elemental troops, they even have the ability to fly at low altitudes, even if it is a lava giant, his height of tens or hundreds of meters makes him run very fast, even if he is touched by the heart of ice a few times, as long as he is not hit by a cannonball.

On such a huge battlefield, if they were really hit in the face by shells from 300 kilometers away, they could only blame themselves for their bad luck.

Although such things will definitely happen non-stop, in general, it is still a small probability event, and it is a tolerable casualty.

It's just that in this way, his army will have no magma cover, and its combat effectiveness will be greatly reduced.

And the defense line built by Emperor Shi Tian doesn't look like it's easy to mess with, it's densely packed with all kinds of alchemy weapons, how many or how many, and there are a large number of troops stationed on it.

When the combat strength is full, it is not easy to fight down, not to mention that when the combat effectiveness is greatly reduced, it will definitely suffer casualties that are difficult to be confident in.

So the lava lord Tagner is a little hesitant, although he has enough troops, but it is not so easy to cultivate elites, and he really doesn't want to be buried here casually, not to mention that there are armies in other three directions to look forward to, if they break through, it doesn't matter if they are late on their side, on the contrary, they can reduce a lot of casualties, the only unpleasant thing is that they will lose some face.

And just as the lava lord Tagna hesitated, the battles in the other three directions also began.

The super cannons on the entire front began to roar almost simultaneously, and the continuous sound of cannons resounded through the sky and the earth, and could be heard even hundreds or thousands of kilometers away.

And the demon legion that endured the shelling was even more profound.

Thousands of cannonballs, wave after wave, fell to the ground, and each wave fell to the ground, immediately creating a series of huge mushroom clouds, accompanied by the wailing and trembling of the earth.

As long as you are a little closer to the landing point of the cannon, no matter what size demon you are, you will basically only be blown up on the spot.

The guy with rough skin and thick flesh is a little better, at most he spits blood and then feels uncomfortable.

The unlucky ghosts with slightly less defense, or too close to the center of the explosion, will almost be torn to pieces by the shockwave, and even a whole corpse will not be found.

You can even see a gold-level Great Demon or Fire Demon accidentally being blown up by a cannonball around them, and then they are torn apart on the spot.

With their rough and thick defenses, they could find scattered corpses, but they were usually thousands of meters away.

Because the formation of the demons was slightly dense when they charged, they suffered heavy casualties in the face of heavy artillery bombardment.

Often, with a single shot, at least hundreds or thousands of demons are killed, and more demons are injured.

After the terrifying shelling, there will be one pit after another on the ground that is more than ten meters deep, scattered with various demon parts, but the complete demon cannot be found.

It is worth mentioning that after observing these 4 opponents, Emperor Shi Tian decided that all heavy artillery should use the spell of Ice Breath.

The reason is very simple, the troops of these four high-level demon lords are all mainly fire demons, and there are only a very few ice demons.

Therefore, the ice spells are extremely lethal to them.

And the spell of Ice Breath, although the power is not particularly strong, but it covers a large area, and it also has a slow effect, and after continuous use, it can also create a large area of cold environment, which will cause serious confusion to the fire demon.

Especially those flame demons, flame demons, etc., which are burning on their bodies, will drop by about 20% in the icy and snowy environment.

Moreover, all other fire-type demons will be affected by the severe cold, and their speed will be reduced, their defense will be reduced, and their strength will also be reduced at the same time.

Although the reduction is not particularly large, the effect is very deadly when scaled into the entire legion.

In addition, Ice Breath has another advantage, that is, the level is low, and there is no need to add high-grade metal when depicting the magic array, as long as it is carved casually on the eggshell.

While doing so will deplete half of the mana from the cannonball, and only half will be converted into the mana of Ice Breath, it will be enough.

Moreover, the remaining magic power is not gone, but transformed into a brutal explosion, and the horrific destruction of the shell landing point cannot be said to be a waste.

Therefore, in this case, out of the consideration of rapid production, Emperor Shi simply arranged the spell of Ice Breath as an additional spell to the cannonball.

And judging from the effect of the feedback now, the spell of Ice Breath is obviously the right choice.

Not only was the Lava Lord Tagner extremely embarrassed by the Breath of Ice, but even the other three high-level Demon Lords were also miserable.

After their troops were sprayed with the breath of ice, even if they didn't die, their bodies were covered with frost, and they shivered from the cold.

The original murderous fast charge has directly turned into a slow run, as if the whole body has been frozen by the cold, and the speed has slowed down by at least 3~5 percent, which is related to different demon types.

If you attack other places, it doesn't matter if you slow down at all, you can run over sooner or later anyway.

But in the face of Emperor Shitian's super giant cannon group, this speed is fatal.

After receiving the first shot, they ran as hard as they could, but they could not run out of the killing range of the second wave of shelling, and even the third and fourth waves of shelling were hit.

If he hadn't been slowed down, the unluckiest guy would have escaped with only two blows, but now he would have to take one or two more rounds of shelling.

This is not an ordinary cannon, but a super cannon with a shell weighing 20 tons, which will be shattered if it is slightly close to the weak point, and will be damaged by the breath of ice even if it is thousands of meters away.

And most importantly, this is not just a matter of one or two rounds of shelling.

Because after those lucky demons broke through the blockade line of the first super cannon, they would soon be bombarded by the super cannon on the second line of defense when they were 200 kilometers away from the defense line.

Each of Shakti's lines of defense was spaced 100 kilometers apart, while the range of the Super Cannon was as high as 300 kilometers.

This also means that if the demon army wants to rush under the defense line, it will have to withstand the shelling from the first, second, and third lines of defense at a distance of 300 kilometers, 200 kilometers, and 100 kilometers from the defense line.

So in this way, the slowing effect of Ice Breath can even make these demons bear an additional 3~6 rounds of artillery damage, which is too much casualties.