There are eight voids on a paper cannon, and each void has four purple fire charms embedded in it. Without injecting spiritual power, it is possible to fire thirty-two consecutive cannons. Even if the Evil Immortal Venerable was here, he would be frightened by Yuan Tian's bold move.

Gentian focused all his energy on the seal and the rune paper, and there could be no mistake in the position of each fall. The four purple fire runes are a large amount of spiritual power injected when the fourth rune is sealed. The paper cannon was different, it was only when the last purple fire rune, that is, the thirty-second rune, was settled, that a large amount of spiritual power began to be infused.

If there was anything wrong with the previous runes, it would be revealed when the spiritual power was infused at the end of the day, and the thirty-two purple fire runes would explode together, and it would be a catastrophe.

The fourth Purple Fire Rune is no problem to be printed, the sixteenth Purple Fire Rune is still no problem to be printed, and the thirty-first rune is still no problem. Before printing the thirty-second rune, Gentian stopped first.

The last purple fire rune is also the most critical rune, after this rune is printed, there is no problem with injecting spiritual power, which means that most of it is undertaken, and the rest is a matter of spiritual power injection.

Yuan Tian shook his somewhat stiff neck and took a few deep breaths. After calming down, he rechecked the thirty-one runes in front of him. Feeling that it was indeed no problem, he picked up the seal and prepared to seal the thirty-second rune.

Success or failure in one fell swoop, when the thirty-second purple fire rune fell, Yuan Tian slightly entered a trace of spiritual power to make a test first. The spiritual power flows smoothly, there is nothing abnormal, and I can finally rest assured.

Holding the seal tightly in his right hand and placing his left hand on top of his right hand, Yuan Tian began to violently pour spiritual power into the paper cannon. The amount of spiritual power that could be stored in thirty-two purple fire runes was simply incredible.

Even with the assistance of a biscuit face futon, it is a very laborious thing. Fortunately, Yuan Tian's cultivation now mentioned the eleventh layer of Qi training, and the amount of spiritual power he can accommodate has increased, and the meridians have become thicker.

The meridians are equivalent to the pipes that transport spiritual power, and if the pipes are not thick enough, even if the spiritual power reserves are large, the flow speed is still very slow. When the meridians are thicker, the spiritual power can pay attention to the paper cannon faster.

I don't know what kind of treasure this cake-faced futon is, it seems to contain infinite spiritual power, and it is continuously transported outward without a trace of interruption. After the spiritual power enters Yuantian's body, it goes up from the tail lu, follows the Ren vein and the Du vein for a small week, and then passes it through the arm to the seal from the top, and enters the paper cannon at the end.

The process of infusion of spiritual power through paper artillery is also a process of exercising oneself for Yuantian. Under the washing of spiritual power over and over again, the meridians became stronger, and at the same time, the body was also nourished.

Spiritual power can be continuously ingested from the futon on the face of the cake, but people's physical energy is limited. With such a high intensity of work, physical strength and energy are rapidly consumed. Gentian's body began to tremble slightly, which was a symptom of his physical strength reaching its limit.

The sweat on his forehead slid down his face, and Gentian rubbed his chin against his clothes. Paper cannons must not get wet until the Sturdy Runes are activated.

Runic paper things are afraid of water, which is not too fatal weakness, but it should not be ignored. If someone attacks a paper cannon with water before it is activated, it will be easily destroyed.

When the purple light converges in, the interlocking paper cannon is declared successful. Yuan Tian held the paper cannon, and there was no joy as he imagined.

The spirit rune is usually packed in a Qiankun bag, and it is only taken out when it is used. If it is activated, it will be thrown out directly, so there is no need to consider the problem of waterproofing. Paper artillery is something that needs to be reused again and again, and it is erected on the wall for a long time. If the waterproof problem is not solved, it is always a hidden danger.

Can you add the water repellent rune, and if so, where should it be? Gentian fell into deep thought.

Removing a Purple Fire Rune from the location of the Embedded Water Repellent Rune may cause instability. Is it feasible to remove a solid rune? Yuan Tian thought about it carefully, and he was not very sure if he did so.

Since the rune properties on the paper cannon cannot be changed, you have to find a way to do it from outside the paper cannon.

There is! Yuan Tianyi slapped his thigh and stood up suddenly, thinking of a notice. The overall structure of the paper cannon is indestructible, but additional attachments can be added to it.

Attach a Water Amulet to the Paper Cannon, which is permanently active. A water-repellent film is formed to make the paper cannon waterproof at all times.

This approach should work, the remaining question is how to make the water-repellent film last longer.

The durability of the water-repellent membrane is already stronger than that of the defensive shield, and even without spiritual power infusion, it can exist for two days. By connecting the spirit patterns, transforming them into a recyclable structure, and infusing them with spiritual power every once in a while, the problem of persistence can be solved.

If you infuse spiritual power every two days, it's still a bit too troublesome. Just get four four-in-a-row water-avoiding runes, sixteen runes have a strong storage capacity, and if you don't infuse spiritual power for a month, it won't hinder your use.

The method of making the water amulet has been learned as early as in the jade slip of the talisman interpretation. However, now is not the time to make water avoidants, and it is imperative to make a few more paper cannons.

When his physical strength was almost recovered, Yuan Tian picked up the talisman pen and spread out the talisman paper, and began to draw the spirit pattern of the second paper cannon.

It was busy until the evening, and a total of five interlocking paper cannons were made. The drawing of the spirit pattern and the printing of the runes did not take much time. It's just that the amount of spiritual power stored in the new paper cannon is too large, which slows down the speed of manufacturing.

If you make ordinary paper artillery, you should be able to make seven today. In the case of interlocking paper artillery, five guns is already the limit.

If he used this to communicate with the four elders, he would definitely be very happy. Will it increase the strength of the reward, in case it is too cool to give something to the Gathering Spirit Pill.

After leaving the mysterious room, he put away the large lighting beads. Yuan Tian pondered as he walked out, the sect still needs to hand over three, and today he can only sell two chain paper cannons to Shidong.

The base plate of the early warning array did not sound, and there should be no problem in the cave. But as the saying goes, be careful to make a ship of ten thousand years. When he reached the edge of the main hall, Yuan Tian still threw a second flame talisman into the cave first.

"Boom", the surging heat wave swept through most of the cave. Some of it even reached the main hall through the opening in the wall.

There shouldn't be any problems, Yuantian probe looked into the cave. I'm not in a hurry to enter now, I've just been roasted by a blazing fire, and the temperature in the cave is too high.

"Whoosh...", a few pale cyan shadows flashed.

This time, the demon beast was so treacherous that it was ambushed in the main hall in advance. When Yuan Tian passed by the main hall just now, they didn't rush to make a move, probably trying to block it in the cave before starting.

Since there are demon beasts in ambush in the main hall, let alone at the entrance of the cave. There are monsters on both sides, and they can't get out, and it's impossible to enter the mysterious room, so what should I do now?