"Before refining, let's arrange a formation around here, so that I can hide my aura so as not to attract human powerhouses to disturb me. ”

Under Lily's guidance, Wu Aotian used the magic crystal to arrange a simple formation of concealing aura, and then sat down with confidence, and threw the hidden thorn directly into the Heavenly Fire Tower according to what Lily said, and also threw the golden jade essence and some other things needed for basic refining into it.

Wu Aotian immersed himself in his mind and entered the Tower of Heavenly Fire to observe how Lily was refining.

The flame at the bottom of the Tower of Heavenly Fire, that is, Lily of Heavenly Fire, greeted it with a flame, and an inverted scroll swept the hidden thorn into it, wrapped in the flames, and slowly calcined, while another flame flew up, directly enveloping the essence of gold and jade.

The golden jade essence quickly turned into a golden liquid, slowly rolling in the flames, and on the other side, the hidden stab that could not see the body was on the forging of the flames, and the formation was shattered by Lily one by one, and the spirit weapon also revealed its body.

It was a black, hard bone, sharp ends.

The temperature of the flame fluctuated from high to low, and even in the same flame, the temperature of different positions was different, which made Wu Aotian amazed at the same time, and finally understood why refining high-level spiritual weapons required special flames of wisdom, because they themselves could control the temperature as they wanted, and on top of a spiritual weapon, it could appear in different temperature areas, which could be controlled as needed.

The thorns slowly became soft, and the flames stretched out, like tentacles, rolling those basic materials into the flames, and quickly melting into the thorns, a little light flickering, but it was Lily who arranged the formation on the spirit weapon.

A good spiritual weapon, the more powerful the formation arranged on it, the greater the effect of the spiritual weapon, and now the formation laid by Lily is to make this invisible hidden thorn become more and more invisible, even when flying, there will be no airflow fluctuations, or spiritual energy fluctuations.

The golden jade essence like a golden liquid was also quickly added to the flames, poured on the hot thorns, with the golden jade essence penetrated, the formations that had just been arranged exuded all kinds of luster one by one, and then faintly dimmed, Wu Aotian knew that this meant that these formations had been successfully carved and solidified.

Lily's refining is very slow, very careful, not in a hurry at all, the process is incomparably smooth and natural, there is no jerky feeling at all, and she can be called a perfect master.

Wu Aotian sat next to him and watched, and he didn't have half a minute of impatience, just one refinement, one watching, and half a day passed quickly.

As soon as the flames were retracted, the hidden thorn was pushed out of the Tower of Heavenly Fire, and at the same time, Lily's voice sounded: "The refining is complete, you only need to re-refine the blood and you can use it, after re-refining, it is difficult for you to use this hidden thorn to be found again, if the opponent is much stronger than you, the chance of being detected will be much higher, this thing is best used as a sneak attack, frontal combat, the effect is not great." ”

Wu Aotian naturally also understood that if this hidden thorn was used for frontal combat, it was just a spiritual weapon, which was not very powerful, but if it was used to sneak attack people, it would be powerful.

If there is an invisible robe to cooperate in the future, coupled with the ability of the Eight Desolations to gather the spirit tripod to restrain the breath, and sneak attack in the night, it will be very bullish.

Just thinking about it has already made Wu Aotian excited and expectant.

Then Wu Aotian spent another day to complete the blood refining of the hidden thorn, and was familiar with its operation, after using it a few times, Wu Aotian was very happy, this guy flew silently, and even the fluctuation of the spiritual weapon was extremely weak, unless the opponent was a super powerful spiritual cultivator who could keenly perceive this abnormality, otherwise this thing was simply a sneak attack and murder.

Wu Aotian had already made up his mind, and when he was done with this side of the matter, he would go to find the evil heart demon worm.

"Now that everything is ready, we can start refining the Immortal Spirit Weapon. ”

Wu Aotian nodded and began to ask the God of Fire: "God of Fire, what shape do you want to refine into, and what special abilities do you have for spiritual weapons?"

The god of fire was also very worried, and looked as ignorant as Wu Aotian: "I don't know, anyway, my goal is very bullish, very bullish, very strong, very strong...... That's it. ”

Wu Aotian was speechless for a while, it seemed that the Vulcan could not give any constructive proposals, and could only pin his hopes on Lily.

"Lily, any good advice?"

Lily was silent for a moment and asked, "Do you want to be an offensive spirit weapon, a defensive spirit weapon, or a spirit weapon with both abilities?"

The Vulcan thought for a moment: "Defensive spirit weapons are definitely not wanted, I don't want to be a shield for being beaten, but is there any difference between this offensive type and the two abilities?"

Lily replied calmly: "Offensive spirit weapon is a spirit weapon with the purpose of pure offensive power, just like a sword, that is purely offensive, but there is no protective ability, and the combination of the two is usually something with a more peculiar appearance, but because of the strong two, there are some differences in formation, so the pure offensive aspect is not as good as the pure offensive spirit weapon, and the defense aspect is not as good as the pure defensive spirit weapon, but it is a very balanced spirit weapon......

Vulcan shook his head and said: "Then I'll choose an offensive spirit weapon, isn't the best defense to attack, this is more in line with my character, I don't want to tie my hands and feet, Aotian, it's no problem for me to choose this way." ”

Wu Aotian smiled: "Naturally, there is no problem, just ask curiously, Lily, what type of spirit weapon are you?"

"In fact, I can only be regarded as an auxiliary immortal spirit weapon, but because of the particularity of the heavenly fire, there will also be some special killing moves, such as absorbing the enemy into the tower and then burning it with the heavenly fire, inside the tower of heavenly fire, with the help of the formation, unless the enemy is much stronger than me, it is difficult to defeat me, if the enemy is outside, in addition to the simplest impact, smashing and other attacks, I can only divide part of the heavenly fire attack, these means are not powerful, in a sense, I am also a defensive immortal spirit weapon. ”

Wu Aotian sighed and said, "Then the Fire God wants to become a pure offensive spirit weapon, do you have any good ideas?"

Lily fell into thought, and only spoke for a while: "The power of the immortal spirit weapon depends on many aspects, the first is the raw materials for refining, the second is the power of the formation contained in the spirit weapon and the special place in the design, the third is the ability of the machine spirit to control the fairy spirit weapon, generally speaking, the stronger the instrument spirit, the easier it is to exert the power of the formation so that the power of the immortal spirit weapon can reach the maximum, and the fourth is the fusion degree of the instrument spirit and the spirit weapon, which is related to the third point. ”

After a slight pause, Lily continued: "Since the Vulcan wants to become a pure offensive spirit weapon, I have an idea, and that is to refine the Fire God into a focused attack spirit weapon......

Wu Aotian and the Fire God were both a little confused, and they didn't quite understand what Lily meant by this, so they didn't hesitate to ask at the moment, "What is a concentrated energy attack spirit weapon?"

"It is to use the formation to absorb the aura on weekdays, and then it can be released at a critical time to make an earth-shattering blow, of course, even if it is not sent out, the combat power is also super strong, and it also has the combat power of the immortal spirit weapon...... I've only done one of these spiritual weapons before, and the formation used is quite complicated, and the success rate is not very high, only about seventy percent sure......"

"What if it fails?" the Vulcan asked nervously, although he also wanted to become extremely powerful, but he didn't want to finish his life, so he didn't ask about success, but first asked about failure, and this question was also what Wu Aotian wanted to ask.

"If you fail, because of the collapse of the formation, your combat power will probably drop by thirty percent, and it will be permanent, and it will be difficult for the immortal spirit weapon to be re-refined like that hidden thorn. ”

The Vulcan was silent, obviously fighting fiercely in his heart, and it took a while for the Vulcan to ask, "Then if it succeeds, how much higher can the combat power be than normal?"

"Gathering energy to attack the spirit weapon, just to release a key blow, the power of this blow is naturally very large, like if you refine it into an immortal spirit weapon, for example, you only have the Heavenly Spirit Quadruple Realm now, once it breaks out, the attack power will expand several times, even if the strong man of the Heavenly Spirit Fivefold Realm faces you, you can only be hit hard, or even killed in seconds!"

"But the aura required by this spiritual weapon is also huge, the more it is absorbed, the more powerful it is, and I also made this suggestion because I have seen the Eight Desolations Gathering Spirit Ding, otherwise, it is still very difficult to provide spiritual energy with people or elixirs. ”

The Vulcan trembled lightly in the air, as if there was undisguised excitement in his heart: "Are you saying that if it succeeds, the combat power of that blow can burst out several times my original combat power?"

"Yes, and if you absorb enough aura, even ten times as much as it is possible, theoretically speaking, the stronger your strength, the more aura you absorb, and the more powerful it will burst out. ”

The god of fire flew in the air for a few laps, as if he was making the last struggle, and after thinking for a long time, he raised his head, and he looked like a strong man who was sluggish and easy to be cold: "Okay, the success rate of seventy percent, I bet on it, the great thing is to reduce the combat effectiveness of thirty percent!"

Wu Aotian thought of this gathering energy, and suddenly thought of something in his heart, and couldn't help but ask, "Lili, are there any appearance restrictions on this spirit weapon?"

Lily's voice was a little suspicious: "What shape do you want to refine this spirit weapon?" The immortal spirit weapon is no longer like a mortal spirit weapon, and it still needs to rely on the sharpness of the shape, whether it is square or round, the power is the same......

Wu Aotian's eyes lit up: "What about the size?"

"Immortal spirit weapons are all very large, and then add formation tempering, and finally shrink to very small, this is the same as the principle of spiritual products......

Wu Aotian's eyes suddenly bent, and he smiled like a thief: "In that case, I have an appearance, can you refer to it......?"