Lu Ziming found a new way to practice his sword and a new way to kill time. It seemed that he vaguely felt that the thick and thin lines on the ancient scroll were not as simple as he imagined. Those thick and thin lines may represent the posture of the sword and the strength of various parts of the body, while the thin lines in front of the person in the painting may represent the sword spirit or the strength of the sword.

Perhaps every line on the scroll contains different meanings, which he doesn't understand at all, but it doesn't hinder him from providing ammunition against emptiness.

Just relying on an ancient scroll, he wants to guess and study. From Lu Ziming's point of view, he can't understand it at all. Without his master's explanation, he is just blind people touching elephants. He can only speculate, imagine and ponder based on very little knowledge.

He first thought of the energy in his body. If the energy in his body is the same as that of fire and ice, why can't it be used as an attack. Although there are differences between them, they are essentially a kind of energy. Whether they have not found the right way, or the energy in the body has other uses. He slowly began to sort out how energy was generated in his body, what were the differences between energy, and why he could pour energy back into others while swallowing it.

He deliberately and ridiculously slowed down the combing speed, for fear that after combing all at once, he would never find new ammunition to kill the emptiness of resistance. He deceived himself and others and slowly deliberated on everything, even every detail.

However, the amount of information he mastered was very small. Soon there was no information to sort out, and there was no advanced theory worthy of further study. It just made him more sure that the sword Qi and the energy in his body were the same. The sword technique on the ancient scroll must not be the work of that bastard's random graffiti.

How exactly did the sword Qi come into being and how to accurately control it? Slowly recall it, carefully peel it off bit by bit, and experience it again and again. The more difficult it is to find the slightest difference, the more he is abnormally happy, because he finally found another thing for himself, Don't be bored to face the boundless emptiness.

However, things always end. I don't know how long it took. Although he was reluctant, he found it. Because this is a meaningful and logical reasoning process, it is impossible to turn a blind eye to the correct conclusion and always sink into the wrong conclusion. He always has to face it when he should face it. He still has the courage.

The use of energy in his body is not as simple as he thought. However, he is not discouraged. Instead, he is a little happy. The higher the difficulty, the happier. He consumes a lot of time and energy in continuous thinking. In general, this is the most "substantial" period of time after he fell into space, in order to offset the terrible emptiness.

With this substantial time, he gradually understood the movement law of energy in his body. The sword Qi must be combined with the sword potential, or when using the sword technique, he needs to mobilize the energy in his body.

These are his guesses, which can only be explained by "maybe", "probably" and "possible". It needs continuous practice and experiments to confirm and get his own explanation, so he still guesses in the end.

Of course, he doesn't know the internal operation rules of sword Qi. In other words, the energy control in his body is far from reaching the level of command like arm.

When all this was over, he basically mastered the use of sword Qi, and the deeper application could not be touched now. He simply had no way to continue in-depth research, so he fell into a long empty state again and used sword Qi mechanically again and again until his physical energy was completely exhausted.

He firmly believes that sword Qi is the use of energy. What ordinary people can beat cattle in space and kill thousands of miles away with one punch is pure bullshit. There is no energy, which violates the law of conservation of energy. Everything is a myth. Even immortals have to use energy.

As for those masters in the story, like a perpetual motion machine, killing one seven in and seven out in the enemy array, he will sneer. That's the result of Yiyin (there's no way, it can only be a typo).

Without the support of energy, he can't even send out a trace of sword Qi. Now he needs a lot of energy to supplement, just like eating when he's hungry.

Looking at the few crystals left on his body, he didn't want to use them now and turned his eyes to the invisible but existing boundary wall. He found one thing for himself again, that is to devour the energy of the boundary wall. The energy of the boundary wall is very weak. Devouring for an hour is not equal to the energy in a crystal, but this does not prevent him from devouring the energy of the boundary wall, because he needs something to do.

Although the energy of the boundary wall is very scarce, it is endless and can't be swallowed up at all.

As the sword Qi becomes more and more fierce, more and more energy is needed. Although he can only draw one sword Qi now, one sword Qi is equivalent to the energy contained in a crystal, and the power of the sword Qi can only cut off a branch thick and thin.

The relationship between energy and sword Qi seems to be in direct proportion. The greater the output energy, the greater the power of sword Qi. However, there is not much energy left in his body, which is not enough for him to do large-scale experiments. Sometimes he can't gather the energy reserve required by swordsmanship once a day.

He swallowed up the energy of the boundary wall and determined his ability to absorb the air with five hearts. No matter what he did, he always consumed more than his reserves. Finally, he had to give up his sword Qi cultivation every day and change to a simple sword posture practice.

With more and more energy stored in his body, he suddenly had a seemingly absurd idea. What would be the result of attacking the boundary wall with sword Qi.

He did not consider the adverse consequences of attacking the boundary wall. What could be worse than his current situation? Since there is no, why not try it.

The boundary wall is a kind of energy, and the sword Qi is also a kind of energy. Will the impact of the two energies be like the effect of the sword Qi splitting branches. No one told him the answer. The answer must be found by himself. With a heart of trying, he waved his wooden sword, "stab...!"

An invisible but perceptible energy wave came out of the sharp roar of the wooden sword, "Chi!" the two energy surged together, and the invisible boundary wall sparkled ripples and quickly spread around.

"He!" a soft force passed back from the tip of the sword, like a real sword stabbed into the water and wrapped in the energy of the boundary wall. In the next second, the sparkling ripples on the boundary wall disappeared without a trace, as if they had never appeared.

He has stored energy in his body for three days. He can't give up because of one failure, "come again!"

"Chop down!"

Still no response, like a stone sinking into the sea.

"Lift up!"

"Again... Cut horizontally!"

"Break it for me!"