The Mortal's Path to Immortality

"Tell me what's your plan next." Wu Qingxuan readily accepted the storage bag containing 10,000 spirit stones and said.

Cao Rui said in a low voice: "Based on the sales volume of the Lingyin Jade Pendant in Qinglingfang City, I think the time to install a signal tower is almost here."

"Refine the signal tower in time and spread the signal of the Lingyin Jade Pendant throughout the southwest of Yunzhou."

"Next, I hope that you, Master Wu, can help me refine the signal tower together."

Wu Qingxuan nodded, "No problem."

"But the signal tower is a first-level magic tool after all. Including me, there are only seven people in the Refining Institute who can refine the signal tower."

Cao Rui said after hearing this: "Not a first-level magic tool, but a second-level magic tool."

"Second-level magic tool?" Wu Qingxuan looked surprised after hearing this.

"Second-level magic tools, are you sure you have so many spiritual pattern crystals to use?"

The spiritual pattern crystals required for the second-level signal tower will increase several times. A signal tower will require at least hundreds of kilograms of spiritual pattern crystals.

Cao Rui glanced at the spiritual pattern crystals in the storage bag and nodded: "Enough. If it is installed as a second-level signal tower, the signal tower's communication distance will be longer, and the number of signal towers can be reduced accordingly."

If it is really the case that several signal towers are installed as before, it will be difficult to deal with human damage, which does not conform to Cao Rui's plan.

There is no shortage of casual cultivators or demon cultivators who specialize in doing bad things in the world of cultivation.

Cao Rui is not going to install signal towers in all areas.

According to Cao Rui's idea, the signal towers will be linearly distributed in all necessary places in the southwest of Yunzhou where signals are stored.

Then according to his own plan, he will form a relationship of interest with local cultivation forces.

They are given the right to recharge, and every Lingyin point sold can earn 10% to 20% of the profit...

No one will refuse a free meal from the sky.

And in the past, those mobile communications could not reach some remote places, and it also did not prevent people from using mobile communications.

Because people will not go to those remote areas at all, even if they go, they will be mentally prepared in advance.

For the Xiuxian world, this is easier to solve.

In addition to connecting the areas where Xiuxian are active, such as: Fangshi, Zongmen, Xiuxian family, ruins and spiritual land, there is no need to build signal towers in other areas where people live.

Most Xiuxian will take the initiative to avoid the human world with thin spiritual energy.

In this way, coupled with the improvement of the signal tower level, the number of signal towers required by Cao Rui will be greatly reduced.

Cao Rui made a rough estimate. According to this method, the number of second-level signal towers needed to connect the entire Yunzhou southwest cultivation forces is less than 100.

If the refined signal tower is better, the number of signal towers required will be even less.

"The cost of a second-level signal tower is about 300,000 spirit stones, and it will take 300,000 spirit stones to install 100 second-level signal towers."

"It seems like a huge expense, but the investment is completely worth it, and half of its cost is on the spirit pattern crystal, so the actual spirit stones required will be less." Cao Rui estimated in his heart.

After pacing back and forth for a while, Wu Qingxuan said, "According to your plan, the second-level signal tower can be engraved with the second-level [Remote Transmission]. I have not fully mastered the second-level [Remote Transmission]. It will take time for me to master this array."

"And the refining of the second-level signal tower requires a cultivator in the foundation-building period. I am afraid that I am the only one in the entire refining academy who can help you refine it."

Cao Rui nodded: "After this trip, I will go into seclusion with you, Wu Shouzuo, to refine instruments and learn arrays."

Wu Qingxuan said, "Since you have this intention, I am happy to accompany you."

The two smiled at each other.

So, Cao Rui and Wu Qingxuan began their seclusion journey in the refining academy.

Each of them had a refining room. When there was a problem, Cao Rui would ask Wu Qingxuan humbly.

Wu Qingxuan had already figured out the materials for the second-level signal tower, so there was no need to change it.

What Cao Rui wanted to learn in seclusion was the second-level weapon refining technique and the second-level [remote transmission]; Wu Qingxuan had already mastered the second-level weapon refining technique, and only needed to hone the second-level [remote transmission].

Wu Qingxuan generously taught Cao Rui a second-level weapon refining technique [Spiritual Pattern Casting Source Technique].

This is a very superior second-level weapon refining technique.

"Spiritual pattern" represents the unique method of spirituality and magic array integrated into the refining process.

Inscribed with runes in this weapon refining technique, it is more powerful.

"Casting source" means to refine materials and fuse elements to cast a magic weapon containing the power of the origin, so that the magic weapon not only has a powerful performance, but also contains a deep inner foundation.

This second-level weapon refining technique is quite profound.

Wu Qingxuan has been practicing it so far, but he has only barely mastered it.

However, after the cultivation, it can greatly improve the speed of refining, the success rate and the quality of the refined magic weapon.

Cao Rui quickly condensed the experience beads of [Spiritual Pattern Casting Source Technique].

Cao Rui felt that he could integrate the perfect-level basic refining technique he had practiced before into [Spiritual Pattern Casting Source Technique].

Without hesitation, he immediately supplied the perfect-level basic refining technique to [Spiritual Pattern Casting Source Technique].

The increased experience value was just enough to get started with [Spiritual Pattern Casting Source Technique].

Afterwards, Cao Rui combined the refining plan in the refining academy, processed it himself, and customized a cheap second-level magic weapon for himself - a disposable second-level auxiliary magic weapon, the hidden weapon blasting needle, with a total cost of more than 100 spirit stones.

This explosive needle is exquisitely designed. Once it is fired, it will explode, releasing powerful force and causing great damage to the enemy.

However, for Cao Rui, this level of power is not of much practical use.

The power of Cao Rui's golden sword is greater than that of the explosive needle.

But if a cultivator in the Qi Refining Stage uses it, it will become a terrible killer.

Of course, for Cao Rui, he developed this second-level magic weapon refining plan not for actual combat, but for his [Spiritual Pattern Casting Source Jue] to brush experience points!

By constantly practicing and using [Spiritual Pattern Casting Source Jue] to refine the second-level explosive needle, Cao Rui can accumulate more experience in refining, so as to perfect the second-level refining technique and use the perfect [Spiritual Pattern Casting Source Jue] to refine the signal tower.

Then engrave the second-level [Remote Transmission].

The second-level [Remote Transmission] is much more complicated than the first-level [Remote Transmission].

However, Cao Rui made rapid progress by engraving experience points on the metal plate.

So.

Three months passed in the blink of an eye.

Cao Rui spent more than 50,000 spirit stones to purchase the raw materials for the blasting needles. After more than 500 times of refining, Cao Rui's experience points in the art of refining rose rapidly.

In the initial attempts, Cao Rui inevitably encountered failures in refining.

However, with the passage of time and the accumulation of experience, he gradually mastered the refining skills and continued to improve.

Finally, when he practiced the [Spiritual Pattern Casting Source Technique] to the level of perfection, great perfection, and even perfection.

The second-level blasting needle he refined was not only powerful, but also had a success rate of 100%.