Konoha Technology Development Base.
The environment in the underground research lab wasn't great. The subterranean darkness made the laboratory feel oppressive.
An Yan observed another experimental material that had been corroded and couldn't help but feel frustrated.
Biology, Chemistry, Environmental Science, and Materials Science—the four great dead-end fields. I can't believe I've fallen into this pit again.
Dark chakra was extremely corrosive. It not only had a corrupting effect on the mind but also a strong physical erosive property, capable of transforming matter into "dark materials" that interfered with chakra flow and affected the holder's sanity.
If he wanted to, An Yan could easily forge a demonic sword right now; dark materials were that easy to create.
Secondly, dark chakra was unstable. During energy transmission, if any nearby creature produced negative emotions, the dark chakra could expand and damage the energy channels.
An Yan's initial idea was to find highly inert materials to resist the corrosion or materials that could spontaneously purify the dark energy.
However, after multiple failed experiments, An Yan realized he had stepped into the bottomless pit of materials science. Konoha was just a small paramilitary organization; it didn't have the national-level resources needed to support such research.
An Yan changed his approach. Instead of trying to convert the dark chakra, he would treat it as a dangerous fuel that required special handling.
That made things much easier. He could use sealing jutsu to collect the chakra and use it to create a chakra cannon—simple, convenient, and efficient. The energy was easy to gather. The only downside was that it was useless in peacetime and could only be deployed during a war.
An Yan's dream of providing electricity to all of Konoha was shattered. In this era, electricity was a rare luxury, and power outages were common, which greatly annoyed him.
Who can understand my pain? They use candles for lighting here!
It would probably be another twenty or thirty years before electricity became widespread in Konoha.
After submitting his report on the chakra cannon, An Yan decided to stop researching dark chakra. He went directly to Tobirama Senju to request a change of project.
Tobirama wore his usual stern, battle-ready expression.
"Give me a good reason, An Yan. Otherwise, I won't approve a random project change."
An Yan replied, "I've thoroughly studied dark chakra. This power only creates evil beings. The purer the negative emotions, the stronger the creature. They are fundamentally different from tailed beasts. Continuing this research is pointless and will only bring disaster."
Tobirama read the report An Yan handed him, which detailed all his experimental data. After a long silence, he ordered the shutdown of the artificial tailed beast project and the destruction of all related data.
The conscious dark chakra creature had its consciousness erased and its form dispersed.
However, the creature's body quickly reformed, and no ninjutsu could destroy it. Left with no choice, Tobirama sealed it away.
Another disaster left behind by Tobirama. Perhaps in the future, they could find a way to petrify it with sage art.
An Yan got his wish and switched to a new project: the popularization of the Flying Thunder God Technique.
"Popularization" really meant lowering the difficulty of learning it. The original version was so difficult that even Hiruzen Sarutobi couldn't master it, let alone others. Tobirama's goal was simple: lower the difficulty to a level that even his idiotic disciples could learn.
The original researchers on the project were reassigned. Tanaka Akira, for example, joined An Yan on the Flying Thunder God project.
The Flying Thunder God Technique was a space-time ninjutsu that allowed the user to place a formula mark on an object and instantly teleport to it. Minato Namikaze had used this technique to devastating effect, killing a large number of ninja in the Third Great Ninja War and forcing the Third Tsuchikage to a truce with Konoha, which earned him the title of Fourth Hokage.
It was a brokenly powerful ninjutsu. If not for plot-induced deaths, it was hard to imagine how people like Tobirama and Minato could have been killed.
Whoever learned this jutsu became a strategic asset. It was incredibly versatile: assassination, escape, logistics, and deflecting attacks.
An Yan couldn't even understand the scroll for the Flying Thunder God Technique. But it didn't matter. As long as he kept looking at it, the system would assume he was in learning mode.
"Flying Thunder God Technique" Learning Progress: 2%... 9%... 28%... 100%. You have systematically learned the space-time ninjutsu—the Flying Thunder God Technique.
A vast amount of knowledge, translated into a form he could understand, flooded his mind. He quickly reviewed it and confirmed that he had mastered the technique.
To use it, he needed to leave a chakra marker. An Yan remembered that Minato's mark was the four characters for "Shinobi Ai no Ken" (Sword of Shinobi Love), which was very chuunibyou. What should his mark be?
An Yan was here?
Mandate of Heaven, may you live long and prosper?
My sword's light is like me, cutting down all weeds?
An Yan pondered this for several days. Tobirama thought he was struggling to learn the jutsu and even came to comfort him, telling him not to rush, which only confused An Yan.
Finally, he settled on a design: the smug emoji face (滑稽).
One day, if he fought Madara Uchiha, he would stamp that smug face on him. He wondered if Madara could still dance after that. It seemed like a good way to provoke an enemy; it could be part of a strategy.
Tanaka Akira already knew An Yan was a genius from working with him, but he never expected him to be this much of a genius. While he was still trying to understand the creative theory behind the Flying Thunder God, An Yan had already successfully performed it.
However, a genius's taste is often inscrutable. Tanaka couldn't understand why An Yan's mark was such a ridiculous expression. Even Tobirama frowned when he saw it.
Orochimaru and Hiruko had been feeling anxious lately. They had all joined the R&D department together, but An Yan was making so much progress while they were moving so slowly. It made them feel inadequate.
They became impatient, which led to mistakes in their experiments.
Tobirama reprimanded them both. Researchers could not be impatient or rash. The two of them blushed in shame.
An Yan paid no mind to his friends' troubles. He was fully immersed in improving the Flying Thunder God Technique.
The jutsu was somewhat similar to the Summoning Jutsu. Summoning brought a beast to the ninja's side, while Flying Thunder God brought the ninja to the mark's side. It was like a reverse summoning.
An Yan wanted to know the fundamental difference between the two, but he didn't have a summoning beast to experiment with. Tobirama just watched him with a cold expression, showing no intention of getting him one.
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