The four brass swords that were crafted by the spirit were each weighing more than one hundred and twenty catties, which was not a weapon that ordinary people could use to wield at all, but it was just right for the golden soldiers, they could swing extremely fast, and this weight would not consume too much energy for them.

The four copper swords that were injected with aura by Zhao Muyi one by one, the original brass luster of the sword body gradually brightened.

Zhao Mu picked up one of them, only to feel that his hands sank suddenly, if his own strength had increased recently, it would not be easy to hold this heavy sword.

After flipping through the inspection, the bronze sword infused with spiritual energy seemed to have no change except for making the sword master shine slightly?

At the very least, with Zhao Mu's current rudimentary test, the bronze sword did not increase any sharpness and power.

"It's really strange, this is not the same effect as I imagined." Zhao Mu was secretly disappointed.

If it was injected with spiritual power, it did not make the copper sword produce a qualitative change-like power, and it was obvious that Zhao Mu's attempt to open his mind this time was estimated to have failed.

He has been busy for so long, but in fact, he has only added an ordinary bronze sword to the Jin Bing, which can only be regarded as a slight improvement in the combat effectiveness and combat methods of the Jin Bing, but it has not produced a qualitative flying effect.

Could it be that it is because the aura itself is a non-offensive and harmless energy, so even if the copper sword has obtained sufficient qi spirit, there is still no improvement or change?

It must be so!

Because the aura is a harmless energy, and there is no sigil that transforms the aura into an offensive nature, the injected aura is still the simplest aura.

So? What if you inject another kind of power into yourself, a more aggressive one?

Suddenly, Zhao Mu thought that in addition to mastering the most basic aura, he also possessed the power of the wind demon and the aura of heavenly thunder.

The former should not be regarded as an offensive energy in itself, and it is also the power of the magic series, so Zhao Mu didn't think much about it, and he put his mind on the Heavenly Thunder Aura.

Obviously, the Heavenly Thunder Aura, even if it has not been transformed by the talisman seal and external forces, is itself a force with its own aggressiveness.

Among the more power systems extended by the aura, the fire aura, the thunder aura, and the ice aura, should be the only ones that have their own offensive power.

Now Zhao Mu's mastery of this Heavenly Thunder Aura is also here.

Thinking of this, Zhao Mu re-energized and decided to try again, he first took back the aura that had been injected into the copper sword before, and then injected a new heavenly thunder aura into the copper sword.

When this qiē was done, the copper sword had a slight change, and I saw that on the surface of the sword's body, there was no longer the previous glimmer, but occasionally there was a trace of dark blue thunder and lightning swimming throughout the copper sword.

Zhao Mu gently held the hilt of the sword in his hand, but immediately was hit by a series of lightning bolts jumping up from the sword body, this force directly made Zhao Mu's whole body numb, and even he was surprised that this power rich in powerful attack and destructive power was about to explode in his body to destroy a qiē.

It just so happened that the Heavenly Thunder Spirit Balloon that had been in the dantian finally reacted quickly, and at this time, Zhao Mu only felt that the Heavenly Thunder Spirit Balloon in the dantian exuded a suction force with great characteristics, and instantly sucked back the extremely destructive Heavenly Thunder Spiritual Qi that hit Zhao Mu's body.

"I'll wipe it, the power that Lao Tzu got out, he actually dared to attack the master me." Zhao Mu scolded, although the scolding seemed to be happy, but in fact, he wiped a cold sweat.

Ma's, if he hadn't had the Heavenly Thunder Spiritual Qi Mass in his body suppressed by the Origin Power Regiment, he would dare to feel that his body would be wasted by the power he had just released.

But then he reacted, Zhao Mu was also happy, he didn't expect it to be a mistake, it was originally impossible to input aura, but the injection of thunder aura had such a big difference.

Sure enough, when this bronze sword was infused with the Heavenly Thunder Aura, this sword had already departed from the things of ordinary weapons, but a copper sword containing the power of Lei Gang.

However, after Zhao Mu's manipulation, the power of the copper sword is indeed qualitative, but it is not completely without shortcomings.

There are two most significant shortcomings, the first is that because the Heavenly Thunder Spiritual Qi injected by Zhao Mu is not an innate spiritual energy, the spiritual runes are independently absorbed and collected Spiritual Qi, but they are rejected by this acquired Heavenly Thunder Spiritual Qi and are rejected outside the sword body.

In other words, the spirit runes that Zhao Mu had entered the sword body before no longer had the ability to absorb spiritual energy, and did not have the engine effect of providing endless power.

Now because Zhao Mu has injected Heavenly Thunder Aura, the only use left for this spirit rune is that it has become a passive storage power device.

Therefore, although the damage power of the Heavenly Thunder Aura injected by Zhao Mu has a very strong effect, they do not have an endless supply of supplements, they are limited, and every time they are used, the Heavenly Thunder Aura stored in the body of the zài sword will be one point less.

It won't be long before the Heavenly Thunder Aura will be completely depleted, and it will fall back into an ordinary copper sword again.

The second disadvantage is that although the damage and destructive power of the Heavenly Thunder Aura is strong, its nature is also destined to have little effect on some inanimate enemies.

For example, if you encounter a legendary zombie, or if the opponent also has a summoning combat power such as a golden soldier, then the destructive power of the Heavenly Thunder Aura will not have much effect.

However, Zhao Mu knew in his heart that the second point of deficiency did not have much impact, what really gave him a headache was the first point of deficiency, it was impossible for him to charge the copper sword after every battle.

If he really wants to do this, once his spiritual power grows up in the future, and more and more bronze people are refined, won't he be busy to death?

Moreover, his personal amount of Heavenly Thunder Spiritual Qi was not much, so how could he charge more copper swords in the future at once?

"It seems that there is still a long way to go if you want to further improve the combat effectiveness of the golden soldiers." Zhao Mu was silent in his heart.

However, if he can do this, Zhao Mu can be regarded as satisfied for the time being, as for how to solve the problem of using one point of the Bronze Sword's Thunder Spiritual Qi to reduce one point, since he can't solve it fundamentally, he can only consider other aspects, and try to use the limited Thunder Spirit power at a critical moment.

To do this, it is not too complicated, and it is not too simple, as long as they need to teach the golden soldiers to distinguish how to use the Heavenly Thunder Aura at a critical moment.

The earliest golden soldier bronze man, Zhao Mu only took a few minutes to teach it how to close the spirit rune with his mind, and how to use his mind to open the spirit rune and input the heavenly thunder aura to the sword.

And it guided it to a kind of consciousness, that is, when it couldn't defeat the enemy by itself, it would activate the spirit rune and use the power of the heavenly thunder aura.

In this teaching process, Zhao Mu only took a few minutes on the first golden soldier bronze man, Ah Da, well, Ah Da is the name of the first golden soldier bronze man.