They won the Holy Grail War, but this turned out to be the Virtual Tree Universe.

Chapter 17: Cultivation complete, time to go find a ghost to practice on (Please continue reading)
Time passed by unnoticed; a year had gone by since we arrived at the Urokodaki Sakonji cabin.

After confirming that magical elements in the air could still exist as true energy, Dan Lei felt that he had discovered a broad road that the Type-Moon magic world had never seen before.

The breathing technique passively dissipates true energy into the flesh and blood, which can strengthen the body and resist ghosts. Dan Lei chose to rely on accumulating power to complete the [Full Concentration Normal].

The outer layer of the meridians is the magic circuit. As long as the magic circuit seals the true qi in the meridians, it can only dissipate within the meridians. When the true qi from behind surges in, it will naturally push the true qi from the front to circulate throughout the body.

Then, once the meridians are truly filled, the magic circuit absorbs some of the meridian energy, completing the continuous flow of energy within the meridians without causing any muscle bursts.

Finally, the magic power, refined a second time by the magic circuit, flowed back into his body, making Danlei feel that his physical abilities were rapidly improving.

Moreover, after Dan Lei's meridians were strengthened to a certain extent, Dan Lei's initial idea was that the process could be reversed. As long as the true qi did not flow backward with the blood and did not drain the energy from his flesh and blood, there would be no problem.

In fact, if Dan Lei had a professional divine magician by his side right now, he would tell Dan Lei that he is now like those divine beasts or phantom beast cubs entering their developmental period, with his body absorbing energy every day to strengthen himself.

On Tanjiro's side, with Sasaki Kojiro occasionally guiding him in swordsmanship, his skills improved even faster than in the original story.

In the original story, Tanjiro took a year to learn all the techniques of Water Breathing. This time, after only ten months, Sakonji Urokodaki said he had nothing left to teach him and told him to go chop rocks.

However, this time Tanjiro didn't have to practice his swordsmanship alone; Danrui and Sasaki Kojiro took turns practicing with him.

The situation was roughly this: after Sasaki Kojiro humiliated Danlei with his swordsmanship, Danlei went to Tanjiro to regain his confidence.

Sometimes, when Sasaki Kojiro saw that Tanjiro's swordsmanship was hitting a bottleneck, he would personally step in to help him break through it.

The breakthrough he's made here is a physical one, achieved through real combat, allowing Tanjiro to experience his own shortcomings firsthand.

As long as the nutrition is adequate, Danlei can treat the minor skin and flesh injuries.

Poor Tanjiro suffered the worst when he sought treatment from Dan Lei. He had at least two hundred wounds on his body, and he was covered in blood. This caused Dan Lei's abundant life force to improve, and he even invented the first method of healing others, the Medicine Dragon Healing the World.

Okay, this trick is to imitate the Azure Dragon Cleansing the World, creating a water dragon full of abundant healing power. This water dragon has almost no killing power, but if you throw it on the injured person and spin it around a few times, it can quickly heal them.

Of course, Tanjiro was very grateful for the genuine kindness that Danri and Sasaki Kojiro showed him.

Although it was completely unintentional, during the New Year season, Tanjiro voluntarily came out and performed all twelve of his family's Hinokami Kagura dances.

This saved Dan Lei the trouble of deceiving the Breath of the Sun, because with Dan Lei's current memory, he could memorize the movements of the Twelve Dances after seeing them only once.

Therefore, this time it didn't take half a year. Just three months after Urokodaki Sakonji assigned the task of cutting rocks, Tanjiro split the boulder in two with a single stroke.

However, splitting the boulder ahead of time did not allow Tanjiro to join the Demon Slayer Corps earlier, because the final selection of the Demon Slayer Corps would not be advanced based on Tanjiro's learning progress; he still had to wait until the timeline in the original story to be assessed.

However, Danlei took his leave after Tanjiro completed the task of splitting the stone.

In fact, long before Tanjiro mastered the entire Water Breathing technique, Tanjiro had already completed the "Complete Concentration Technique," and it wasn't a trick; he genuinely accomplished it using only breathing techniques.

Danlei's rapid progress is related to his rapid physical development.

At this point, Sasaki Kojiro judged that Dan Lei had now surpassed Tomioka Giyu in everything except for his proficiency in martial arts and his ability to adapt to changing circumstances in battle.

According to Sasaki Kojiro, if Dan Lei wants to further improve his martial arts skills, he needs to engage in combat—not the kind of sparring with Sasaki Kojiro where he knows he won't die, but direct confrontation with an enemy's killing intent, face-to-face, bloody battles. For Dan Lei, his research on demons has also reached a bottleneck. He can't imitate Blood Demon Arts, the bloodlines of ordinary demons are too mixed, and his progress in analyzing demon bloodlines is zero.

The research on absorbing the energy of the ley lines also came to a standstill because Nezuko had absorbed enough energy and fell into a deep sleep.

However, out of a desire to see things through to the end, Danlei stayed until Tanjiro had completed all his training courses before bidding farewell to Urokodaki Sakonji and Tanjiro.

For over a year, the Demon Slayer Corps did not contact Dan Lei even once, clearly still holding considerable suspicion.

But this is understandable. If the Demon Slayer Corps hadn't been careful, they would have been wiped out by Muzan Kibutsuji long ago. How could they have been entangled for so many years?

Fortunately, Danlei didn't actually need to see the Demon Slayer Corps leader. He didn't have a mission in this world, and he was currently trapped here because the Holy Grail's energy for his journey hadn't been fully replenished.

So Danlei could actually do whatever he wanted. However, the education he received in his previous life and this life made him someone who was willing to abide by rules and order, but when order seriously conflicted with his inner thoughts, he would follow his inner thoughts, and when the conflict was not serious, he would follow the order.

However, due to the influence of the second life, don't expect Danlei to prioritize the safety of ordinary people once he begins to act.

It can only be said that Dan Lei will consider the safety of ordinary people, but if he feels that taking care of ordinary people is too troublesome, Dan Lei will completely ignore them.

Moreover, if an ordinary person were to get themselves into trouble due to ignorance, Dan Lei might be capable of murder and arson.

According to the D&D faction classification, Danlei believes his faction should be neutral evil, but leans towards absolute neutral.

Tanjiro was actually very reluctant to see Tanjiro and Sasaki Kojiro leave, but he also knew that the two of them couldn't stay with him forever, so he still said goodbye with tears in his eyes.

As for Urokodaki Sakonji, he had seen many partings, so he remained calm.

However, before leaving, Dan Lei asked Urokodaki Sakon for two Nichirin swords.

The reason why the Nichirin Blade can kill demons is that the metal used to forge the blade absorbs a certain type of radiation from the sun, which is a natural nemesis of demons.

As for why only cutting off the neck can kill a ghost, Dan Lei said that he has dissected dozens of ghosts but still couldn't find the reason. He can only say that it was set by the creator god.

But Danlei felt that asking him to imitate this radiation was giving him too much credit.

Don't be fooled by your impressive research on ghosts; everything about ghosts has never exceeded the scope of your own knowledge.

Dan Lei's knowledge mainly comes from three sources: his understanding of the settings of various worlds from his previous life, the puppet-making knowledge he learned from Aozaki Touko in his previous life, and the basic scientific knowledge, medical knowledge, puppet knowledge, basic knowledge of the Destiny Walker, and the common Cloud Chanting Technique that can be learned by the Ming Clan in this life.

However, this does not include aspects of stellar energy. Reproducing the radiation fluctuations of the sun is a subject of astronomical research at the Clock Tower, and in Luofu, it is a subject studied by specialized scholars.

Dan Lei is neither here nor there, so naturally he doesn't know how to reproduce stellar radiation.

Therefore, even if you have the means to kill demons, cutting their necks with a Nichirin Blade is still the most efficient method.

Dan Lei was certainly not foolish enough to use simple methods instead of his magic to kill the ghost.

(End of this chapter)