Merlin has been in the Upanishads for three days, and in these three days, he has become familiar with the Upanishads in general, but if he wants to understand it deeply, it is not something that Merlin can do now.

The Upanishads are not big, but they are not small either, especially in some places, which are not yet within the reach of Merlin now.

Merlin lived in a strange oval-shaped room, which was spacious and tight, and even the great legends could not see the situation of the spellcasters who lived in these strange houses through their spiritual powers.

This is also a house that was personally laid out by the great Upanishon, where potential mages have absolute privacy and no one is allowed to trespass.

Merlin was at ease when he was in the room, he had spent three days observing and familiarizing himself with the Upanishads, and now, he was ready to start building spells.

"You can build some sixth-level spells first to increase your strength!"

Merlin wasn't in a hurry before, because with his fusion spells, as well as various magical abilities and spells, he was comparable to an ordinary ninth-level spellcaster, and he was quite demonic and strong.

However, when he came to the City of Upanishads, Merlin felt the pressure, although his "talent" was still good, suppressing a large number of geniuses, but the gap in level could not be ignored, such as Satrian, although Merlin is also a six-system spellcaster, although Merlin's perfect-level spells are more than Sat'an, but Sat'an is a seventh-level spellcaster, and if he really fights, Merlin is not Satyan's opponent.

Therefore, Merlin needs to increase some strength as appropriate, and now he has basically reached a bottleneck in all aspects, and he wants to increase his strength. Naturally, you have to build a sixth-level spell.

"Matrix number. Launch!"

Merlin activated the Matrix Number. He wanted to deduce a brand-new sixth-level spell, and these sixth-level spells, and to deduce them, it was naturally very difficult, and the energy required was unimaginably huge.

But fortunately, Merlin was pressed by the god of the sky, but he did not die. That huge amount of divine power was absorbed by the Matrix and stored as a special energy, and now Merlin can use this special energy to deduce a new sixth-level spell.

"Matrix Number, derive a new sixth-level spell!"

Merlin quickly gave the order, and suddenly, the Matrix began to operate, and Merlin could clearly see that that special energy was disappearing at a speed visible to the naked eye to support the derivation of the Matrix.

The best thing about matrix numbers is the arithmetic. The spell model itself is very complex to support such complex calculations. The energy required is naturally unimaginable, Merlin once wanted to use mana or elemental spars to see if the matrix number could absorb it, but it failed in the end, and the matrix number currently does not seem to absorb other energy except for the divine power of the gods and the laws of the legendary mage.

This caused Merlin to be very embarrassed, his Thunder Law was also a little less when he used a little, and the energy required to derive a sixth-level spell increased exponentially, far from being comparable to a fifth-level spell.

I'm afraid that if you want to build six sixth-level spells, the law of thunder will be almost used, and in the future, there will be seventh, eighth, or even ninth-level spells, which all need to be derived by the matrix number, and the energy required, Merlin can't imagine how huge it will be now.

This may be the biggest drawback of the matrix number, but think about it, the spells deduced by the matrix number are at least excellent, and there are even a lot of perfect-level spells, which is what ordinary spellcasters can do?

There are advantages and disadvantages, Merlin has been able to grow into the current demon mage, all of them rely on the matrix number, so no matter how difficult it is, he will have to find a way in the future to find some laws or divine powers of the gods.

After a few hours, the matrix number finally deduced the sixth-level spell, and Merlin checked the stored divine energy again, and found that there was not much left, and it was impossible to deduce a second sixth-level spell by relying on the divine energy.

"The spiritual power has not yet reached the limit of the seventh-level spiritual heart, and there is no problem in building a few sixth-level spells now, but if you want to build all the sixth-level spells, you must at least reach the peak of the seventh-level spiritual heart!"

Merlin estimated the mental power needed to construct six sixth-level spells, and the reason why he was able to construct all sixth-level spells at the limit of the seventh-level spiritual heart was thanks to the continuous compression of Merlin's spiritual heart, especially the spiritual secret technique explosion theory of Master Ossaith, which made Merlin's spiritual heart almost compressed by half.

Therefore, it is possible to construct all the sixth-level spells when the seventh-level spiritual heart is at the seventh level, otherwise it must at least break through to the eighth-level spiritual heart.

Because of the explosion theory, constantly compressing the spiritual heart, Merlin currently has a great advantage in terms of spiritual power, even if it is also a spiritual power, there are few people whose spiritual heart is already so powerful at the seventh level.

Merlin first deduced the sixth-level fire-based spell, and Merlin had already planned it, and the second sixth-level spell was to derive the thunder-based spell.

The reason why we have to build fire and thunder spells first, naturally because these two spells can be fused now, once fused, the power of the two perfect level sixth-level spells will become extremely powerful, at least, it will become quite easy to kill the general ninth-level spellcaster, and even compete with some slightly stronger ninth-level mages.

Immediately afterwards, Merlin began to consume the law of thunder and deduce the thunder spell, this sixth-level spell is too expensive to deduce, and the huge thunder law, because of the derivation of a sixth-level spell, is rapidly shrinking at a speed visible to the naked eye in a few hours.

Finally, the lightning spell was also deduced, and all that remained was to construct the spell.

For the construction of spells, Merlin is already familiar with the way, he is the first to choose, 100% fit spells, before Merlin did not know that there are spells and classifications, just know the strength of the Dao, but now know the Dao, basically the fit is 100%, the spell is strong enough, it can be called the perfect level.

And the perfect-level spell, no matter how much is built, will actually not have any impact and pressure on the spell model, otherwise, if there are too many spell models, it will put pressure on the previous spell model, and even the spell model will collapse at that time. Only perfect-tier spells, because they fit 100% of the time, will not put pressure on other spell models and collapse.

Merlin began to select the deduced fire spells and thunder spells, naturally the first thing is that the compatibility is 100%, such a spell is a perfect level spell, and the spell model will not be shaken in the future, and there will not be much danger when fusing spells.

This is also the most important reason why those caster families have paid attention to spell construction since childhood, and the spell model, which runs through almost half of the caster's life, is very important for the achievement of the archmage.

Once you become an archmage, the spell model is useless, because when you become an archmage, you will consider the law of condensation, which is the essence of the element.

Merlin finally chose two spells, which he named Endless Fire and Mighty Thunder.

These two spells need to be simulated in the sea of knowledge, and it will take a few days, so Merlin can only mobilize his mental power and start simulating these two spell models with all his might.

About seven days later, Merlin opened his eyes with satisfaction, he had successfully built two sixth-level spells in the sea of knowledge, although two spells were added, but Merlin's sea of knowledge was very stable, and there was no trace of turmoil at all.

Many spellcasters, the more spell models they build, the higher the level, the more unstable the spell models in Zhihai will be, and even every time a new spell model is built, Zhihai will shake.

Such a spellcaster, even if he is lucky enough to become a ninth-level spellcaster, in this life, he will not want to fuse the spell model and become a powerful archmage, because the spell model is not stable, and at the moment of fusion, the spell model will collapse if there is a slight deviation.

The path of the spellcaster is very difficult, and if you make a slight mistake, you will fall into a place of no return, and Merlin has the help of the matrix number, at least it is not so hard.

However, Merlin was also troubled by his mental power, which hindered his speed of building a spell model, just like now, Merlin's spiritual power did not reach the limit of the seventh-level spiritual heart, and he could not construct a complete sixth-level spell, so he naturally could not become a real sixth-level spellcaster.

After constructing the spell, Merlin began to absorb the elements and convert them into mana, but fortunately, the elements in the Upanishads were too large, even faster than Merlin's transformation with elemental crystals, so Merlin closed his eyes again and began to run the two spell models that had just been built, absorbing the rich elements, converting them into mana, and storing them in the spell model.

One, two, three......

Merlin was transforming elements into mana, and there was basically no one to disturb him at this time, but Merlin opened his eyes and frowned slightly, because outside his gate, someone touched the rune circle at this time.

"Who's going to come to me?"

Merlin thought about it carefully, in the city of Upanishads, he only knew the fat mage Arot and the arrogant mage Sat'an, and with the arrogant attitude of Mage Satyan, he would not take the initiative to come to Merlin at all.

After pondering for a while, Merlin still temporarily stopped transforming mana, his spell model had accumulated a lot of mana, although it was not full, but it also had seven or eight points, and he was not in a hurry.

Merlin stood up and opened the door.

A bloated and fat body immediately appeared outside the door, and Merlin didn't need to see the appearance clearly to know who Lu Dao was.

"Merlin, come with me, it's a big deal, you are indispensable this time, Satyan has already gone up, and it's up to you next!"

Outside the door was the fat mage Arot, after he saw Merlin, he couldn't help but say, he directly pulled Merlin, and quickly flew into the void, looking at his expression, he seemed to be a little anxious. (To be continued......)