Outside the castle, the cold wind gusted, and it was snowing heavily, and the snowflakes on the ground even condensed into thin ice, but Merlin didn't feel a chill at all, but felt a burst of heat, and even took off his thick fluffy coat and wore only a thin shirt.

The spell model of the fireball spell is finally simulated in the sea of knowledge, and the next thing Merlin has to do is to test the power of the fireball technique.

Merlin looked around the room, the environment was not suitable for the test of fireballs, so Merlin put on his coat, pushed open the door and walked out.

He remembered that in the old castle of Wilson, there was a secret basement, very secretive, and very spacious, and only the old Wilson, the butler, and Merlin knew about it.

Merlin wants to test the power of fireballs, and the basement is the best place to do it.

As far as he could remember, Merlin went straight to Wilson Sr.'s room, and he gently pressed a brick on the wall, which was the mechanism of the underground passage.

"Click. ”

There was a crisp sound, and one of the walls in old Wilson's room began to gradually separate to the sides, and some dust shook off and scattered it on the floor.

After a while, a swarthy hole appeared in front of Merlin's eyes, and he reached out and took the candlestick on the old Wilson's table, lit a few candles on the candlestick, and with the faint light of the candles, entered the hole.

The passage was dark, and because no one had entered it for a long time, there was a dull and very unpleasant smell in it, and Merlin cautiously continued to walk.

This passage is diagonally down, a long stone staircase, leading to a place about a hundred meters underground, on both sides of the passage, there are also many candlesticks, Merlin every time he comes across a candlestick, he will light the candle, so after a while, this dark passage, become brightly lit, very bright.

After a few minutes of walking, the stone steps finally disappeared, and Merlin came to a spacious basement.

The basement was just a hall, and around the hall, there were more than a dozen small rooms, all of which contained swords, guns, shields, and armor.

Merlin still remembers that when he was ten years old, he was brought in by Wilson Sr. several times, and when Wilson Sr. was building the castle, he referred to the structure of some military fortresses, so there was such a basement where only one person could enter, and if there was any danger, he could hide in the basement.

If you have prepared in advance, fill the basement with enough reserves to live for hundreds of people for a whole year.

However, after so many years, Blackwater City is also calm, and there is no war, so the basement is gradually deserted.

The basement was deserted, but it provided Merlin with plenty of space to test the power of the fireball.

So, Merlin stood in the middle of the underground hall and began to silently feel the spell model in the sea of knowledge.

At this time, the spell model in the sea of knowledge was still slowly rotating, and even the ground had a trace of fire element, which was gradually integrated into the spell model.

The longer the spell model exists, the deeper the mana it accumulates, so once the spell model is built in the sea of knowledge, you don't have to worry about it, the spell model will automatically accumulate mana.

Merlin carefully read through the spell codex of the old man Aita, and also knew that the method of releasing the spell was very simple, just need to stimulate the spell model with mental power, and the spell could be instantly activated.

"Fireball!"

Merlin let out a low snort, his spiritual power directly stimulated the spell model of the fireball technique, and suddenly, a fireball exuding a scorching aura appeared in the void out of thin air, less than a meter away from Merlin.

Merlin was overjoyed, but he didn't control his mental power, and the fireball dispersed in the blink of an eye.

The fireball dispersed, this was because Merlin did not master the mental power well, after all, once the fireball was released, it also needed the caster's mental power to control.

Although he failed the first time, Merlin was not discouraged, he summed up the lessons and unleashed another fireball.

This time, he steadily controlled the fireball with his mental power, and began to guide the small fireball to flutter around in the air.

"Bang".

The fireball slammed into the hard wall, and the small fist-sized fireball seemed to contain a great deal of force, making the hard wall tremble slightly, and leaving a half-inch hole in the wall, which was burned by the fireball.

This alone could not really reflect the power of the fireball technique, Merlin took out a piece of heavy armor from the inventory in the basement, which was the standard equipment of a heavy knight, once put on, those sharp knight guns could not pierce the heavy armor.

Merlin used this heavy armor to test the power of the fireball technique, which was naturally the most appropriate.

He hung his heavy armor on the wall, but instead of continuing to perform the fireball spell, he sat down and began to rest.

Merlin rubbed his head slightly with both hands, just after only casting the fireball technique twice, he found that the mana accumulated on the spell model had been consumed, and if he wanted to cast the fireball spell again, he could only wait until it had recovered its mana.

Looking at the spell model in the sea of knowledge, absorbing the fire element from the outside world little by little, Merlin thought for a moment and muttered in a low voice: "It seems that because the spell model built is still short, it can only release the fireball technique twice." ”

For the scarcity of mana, Merlin is helpless, and the accumulation of mana can only rely on the accumulation of spell models for a long time, and there is no shortcut.

After an hour, the spell model slowly came back to life, and Merlin was finally able to unleash the fireball spell again.

"Go!"

Merlin unleashed the fireball technique again, this time he was already familiar with the fireball technique, so he quickly cast the fireball technique, he controlled the small fireball in front of him, and smashed the heavy armor on the wall.

"Snort".

There was no loud noise as imagined, and the chest with the strongest defense on the heavy armor, a thick chest guard, was directly burned by the small fireball into a fist-sized hole, and a trace of light smoke was still emitting from the hole entrance.

"Hiss".

Even Merlin couldn't help but gasp, he was surprised, although he expected that the power of the Fireball Technique would definitely be extraordinary, but he didn't expect it to be so strong.

This is a heavy armor made of fine iron, and its defensive power is among the top in armor, and even a knight's spear can't pierce it.

But even the heavy armor with such a powerful defense was easily pierced by the fireball technique, and the small fireball released by Merlin contained a terrifying temperature.

"Huh, what is this?"

Merlin came back to his senses, and when he was looking at the spell model in the sea of consciousness, he suddenly made a new discovery, in his sea of consciousness, next to the slowly rotating spell model, there was actually a gray horizontal frame.

This gray horizontal frame appeared in the sea of knowledge, especially around the spell model, causing Merlin to worry.

"When did this come about?"

Merlin frowned tightly, he remembered very well that when he first built the spell model, there was no such gray horizontal frame, which must have just appeared.

So he looked more closely, and found that most of the gray horizontal frame had been faintly lit up, and a small half of the area was still gray.

Merlin had been observing for a long time, but he didn't know what this frame was, and he didn't know when it appeared in the Sea of Knowledge, but he didn't plan to waste any more time studying it, and it would take him a long time to get familiar with the process of casting the fireball technique.

As a result, Merlin released a fireball again, and his spiritual power guided this fireball directly into the heavy armor.

"Boom".

This time, the entire fireball actually exploded and scattered in all directions, and even the heavy armor with amazing defensive power was blown into a pile of scrap iron.

This is the role of spiritual power, spiritual power can not only guide the direction of the spell, but also can make many changes, such as making the fireball explode violently when it hits the enemy, if you want to deal with some hard objects, then don't explode, but rely on the high temperature of the fireball, directly piercing.

These are some of the techniques for casting spells, and it takes a long time to practice or fight with people before you can gradually find out the various effects of spells.

After all, Merlin still has a short time to build a spell model, so he usually casts the fireball spell twice, and the mana is exhausted, so he must rest at this time and wait for the mana to gradually recover.

If the spell model is forcibly stimulated at all costs, it is likely to cause the spell model to collapse, causing severe damage to the caster.

These taboos in the process of casting spells are written in detail in the spell codex of the old man Aita, and Merlin keeps them all in mind.

In the process of resting, Merlin found the gray horizontal frame in the sea of knowledge, but strangely, the horizontal frame was no longer gray, but turned red.

Looking at the red frame, Merlin had a strange feeling in his heart, so he tried to touch the red frame with his mental power.

"Buzz".

Suddenly, stimulated by Merlin's spiritual power, the red horizontal frame suddenly emitted a dazzling light, and the spell model, which had been quietly recovering without movement, actually spun violently again.

At the same time, the mana that had just recovered a little bit was quickly extracted by the spell model, and before Merlin could figure out what was going on, a huge fireball suddenly appeared in front of Merlin, floating quietly in the air, and the fireball seemed to be very unstable inside, as if it would explode at any time.

Merlin looked at this huge fireball in amazement, if the previous fireball was only the size of a fist, then now this fireball is almost the size of three or four fists.

"Not good. ”

Without the guidance of Merlin's spiritual power, and the fact that the fireball seemed to be extremely unstable inside, it was faintly about to explode, Merlin sensed the danger and immediately used his spiritual power to guide the fireball to the ground.

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