Each floor of the Tower of Babel is divided into five levels, one level is difficult and one level, each level has a different potential powerhouse, and the five levels are roughly divided into potential levels, latent sensitive levels, latent body levels, subliminal levels and latent spirit levels.

Zhang Yi also knew about these things for a long time, and he didn't go to see the Tongtian List, but after bypassing everyone, he came to a checkpoint and walked in.

There are not many people challenging the first floor, and there is almost no difficulty, and the Tower of Babel is also open day and night, so there is no queue to break through the level on this level.

Zhang Yi entered the first level, and inside was a trap beast, whose strength was about seven layers of submersibles.

I don't know what kind of equipment it uses to refine the trap beast, although it doesn't have potential, but its huge body, even if it touches the seventh layer, even if it touches the seventh layer, it has to avoid the edge for the time being.

Seeing the trap beast pounce, Zhang Yi didn't dodge, but kicked the trap beast away from the side of his body.

The trap beast fell heavily to the ground, I have to say that the material of this trap beast is hard, Zhang Yi's blow is powerful, but it has thousands of catties of huge power, I didn't expect this trap beast to withstand it.

At this time, out of nowhere, there was a sound of 'successful clearance', and then, a door opened from one place.

At the same time, a trace of energy that was difficult to see with the naked eye floated out of the body of the trap beast and entered Zhang Yi's body.

This trace of energy is very peculiar, after entering the body, it swam around Zhang Yi's internal organs and facial features, and then stopped on the roof of the lungs.

Zhang Yi tried to control that trace of energy, but he was really able to control it, and tried to use his potential to hit the rooftop with that trace of energy, but the rooftop was as solid as a rock, and he didn't move at all.

"Is it because the weather is not enough?" Thinking of this, Zhang Yi did not hesitate and walked to the next level.

The second level is also a trap beast, and its strength is also touching the submersion for seven days, and when the trap beast pounces, Zhang Yi slappes it away, and the same trace of energy that is not visible to the naked eye enters Zhang Yi's body, and the third level is also opened.

After challenging a few levels, Zhang Yi understood that the previous levels were not difficult, and let the disciples of the academy get the weather and indirectly understand the strength of the beast.

Seeing this, Zhang Yi did not hesitate, and directly broke through to the tenth layer in one breath, and then stopped.

When he reached the tenth layer, the difficulty was already close to the strength of the two days of sneaking, and Zhang Yi was not in a hurry to continue the challenge for a while, because the collected weather had already condensed the model of the needle in his body at this moment.

Every challenge level has a trace of weather, and the weather on the ten floors is already quite a lot, which is enough to be completely condensed.

It seems that this weather is quite spiritual.

Waiting for the last trace of the weather to enter the body, a silver needle full of energy quickly formed, and soon, the thumb-length needle began to swim in Zhang Yi's viscera and facial features, and Zhang Yi did not stop it, allowing the weather to swim away.

If Zhang Yi notices the abnormality of the weather, not to mention eliminating the weather, but using his potential to force him out of the body, he can still do it.

Eventually, the silver needle rests on the roof of the lungs, and the tip of the needle points to one part of the rooftop, which is the weak point of the roof.

Zhang Yi didn't hesitate, and immediately sat down cross-legged, and the potential in his body was used to carry the Heavenly Needle, bombarding the weak point of the rooftop.

With the impact of potential and the needle, the rooftop shattered in an instant, the rooftop diaphragm disappeared, and the rooftop also turned into potential nutrients at this moment, and began to nourish Zhang Yi's viscera and lungs, and repair the defects of the lungs and nose.

A potential that was almost several times stronger than before, instantly permeated Zhang Yi's whole body, and even his physical strength, spirit, and consciousness were also stronger, compared to the previous two days, the two were not at the same level at all.

"Snooping for three days!" Zhang Yi stood up, his whole body was full of explosive power, not to mention this, even his sense of smell broke through the limitations of human beings, comparable to the sense of smell of a beast.

Soon, Zhang Yi's excited mood calmed down, and he sat cross-legged at the next time, and had a trace of thought in his heart, he wanted to try to sneak for four days.

However, after Zhang Yi tried this idea, he was disappointed, although the potential in his body has become stronger, but if he wants to break through the voyeur for four days, even if there is a needle pointing to the weak point of the rooftop, it is still not enough, far from enough.

Just when Zhang Yi broke through the voyeur for three days, he suddenly had a cultivation method in his mind that could quickly enhance his potential.

The cultivation method of the three days of peeping and diving is roughly the same as that of the second day, but there are some changes in details, Zhang Yi also carefully wrote it down, now that he has the method of cultivation, it will be much easier to practice for three days of peeping and diving in the future, and it is not as before, the cultivation without a clue, how to have strong potential is not very clear.

However, Zhang Yi walked out of the Tower of Babel and went straight to the refining room, he had not yet finished refining the best weapon, and he was about to start polishing the last step.

Zhang Yi came to the refining room, searched for it, and found that his superb weapon was missing, and after thinking about it, it was estimated that the old man surnamed An took it away, and Zhang Yi knew it.

The last step of polishing, there is almost no technology, that day to polish the next grade weapon, practice for an afternoon, Zhang Yi has been proficient in the method.

Weapons can be forged, and this spiritual weapon is not comparable to weapons.

Zhang Yi took the paper left by the old man surnamed An, and looked at the materials for refining the spiritual weapon, it was a bit much!

"Refined iron, stainless steel, the blood and bone marrow of the beasts that control the Nine Courts!" Seeing this, Zhang Yi took a breath of cold air!

Not to mention anything else, just by submerging the essence and blood of the Nine Courts Beast, its value is not weaker than a low-grade spiritual weapon! Now it seems that this refining weapon is a rather expensive industry.

"Refining weapons only requires pig iron and cold iron, and spiritual weapons are added with the essence blood and bone marrow of fierce beasts......" Zhang Yi glanced at the paper in his hand, there was no way to refine spiritual weapons on it.

I won't! I really won't! I really don't know anything!

At this moment, Zhang Yi has a feeling of wanting to cry without tears, he really can't do anything!

Suddenly, Zhang Yi thought of the spirit of the spirit weapon, could it be the blood and bone marrow of the beast, is it to inject the spirit into the spirit weapon?

But rumors say that stainless steel and refined iron themselves are not ordinary iron, both are precious iron, which must contain spirit, and if it is forged casually, it is also much stronger than weapons, and it adds essence blood and bone marrow, so why bother?

Which step is added in the refining weapon, Zhang Yi has no clue, how to refine it?

Zhang Yi sat up against the wall, stunned for a while.

He didn't dare to do it blindly, if the spirit weapon was not refined well, it would be an ordinary weapon, or even scrap iron, Zhang Yi didn't dare to be careless.

Zhang Yi glanced at the refined iron and steel, and found that there was a faint flow of energy on them, which showed that they were not ordinary iron.

Zhang Yi then took out the green sword behind him and looked at it carefully for a moment, but he couldn't find out what kind of material it was.

There are still runes flowing on the green sword, but the runes are relatively dim and difficult to see.

Seeing the runes of the green sword, Zhang Yi sometimes wondered if this green sword was a magic weapon? But if it was a magic weapon, it did not have the power of a magic weapon, Zhang Yi also asked about innocence, but he didn't say why.

Fortunately, there are other spiritual weapons in the refining room of this old man surnamed An, almost all of them are low-grade spiritual weapons, and he is not afraid of others stealing them, maybe the old man surnamed An is waiting for the thief to come to the door in that inconspicuous corner.

Zhang Yi took one out casually, knocked it with his fingers, and then looked at the fine iron, and found that the two were of the same material, which showed that this inferior spiritual weapon was also cast by fine iron.

Seeing this, Zhang Yi relied on his sense of smell and sniffed the spiritual weapon, but except for the smell of rust, he failed to find the essence blood or bone marrow of the beast.

If Zhang Yi expected it to be true, the material for refining the low-grade spirit weapon would be refined iron, and the refining of the middle-grade spirit weapon, the high-grade spirit weapon and the top-grade spirit weapon would add the essence blood and bone marrow of the fierce beast.

Thinking about it like this, Zhang Yi's heart was also thorough, and without hesitation, he picked up thousands of catties of fine iron, put it on the casting table, and began to forge.

With a hammer, a shallow mark appeared, and seeing this, Zhang Yi frowned.

It seems that this refined iron is much harder than cold iron and pig iron, and if you want to completely remove impurities, I am afraid that it will not be possible to complete it without more than ten days of effort.

Seeing this, Zhang Yi remembered the words of the old man surnamed An, and regarded fine iron as a life, not forging it with brute force, but using a forging hammer to give life to it, so that it could eliminate impurities by itself.

Zhang Yi didn't hesitate, and the potential in his hand was not as hard as before, he hit the fine iron very usually, and felt the changes in the cold iron by passing the force in his hand.

With the frequency of the blows, a strange feeling emerged from Zhang Yi's body, as if Zhang Yi was not forging, but creating life and giving life to cold iron.