The universe begins with Demon Slayer: Kimetsu no Yaiba

Tanjiro saw that Taki Zuo had a rare concentration recently, and he couldn't help but lean in, and then asked: "Master, Mr. Iron Tsukasa, is the two-color blade of Shiraha-senpai special?"

"It's not that it's not special, but the two-color blade didn't exist before!" Taki said to Tanjiro.

When Bai Yu heard Taki Zuoji's words, he understood why they were so shocked, it turned out that his two-color Nikkawa knife was unique.

What difference would it make if this is a two-color nikki knife? Is it just plain good-looking? Bai Yu couldn't help but ask himself in his heart.

"It's superb! The two colors of this water and milk blend very harmoniously, without a little conflict. It's a stroke of God! "Steel Tsukasa gave Shiroha a very high opinion of the two-color Nikka, and Steel Tsukasa looked at the Nikkawa Knife like a very beautiful woman.

"Since the two-color Nikkawa knife is unique, what is the difference between it and an ordinary Nikkaku?" Bai Yu brought this up at this time.

As soon as Bai Yu's question was raised, he immediately asked Taki Zuo Jinji and Steel Tsukasuka.

None of them have ever used a two-color nikken, and the two-color nikki knife has never appeared, let alone any previous records, so what is the difference, no one knows.

"You may not know this until you use it yourself." Izuku gave a comparative answer from the past.

Iron Tsukasa also nodded in affirmation, after all, the color is produced according to the owner, since Shiraha's Nikkawa knife produces two colors, it should be related to Shiraba itself.

"In my guess, I think that the part of this sky blue like a water spray should be related to the breath of water that Bai Yu learned, because your knife is also sky blue. As for the green that suddenly ran out, I can't guess. Izuka spoke out about his analysis.

Bai Yu and Taki nodded in agreement.

After Izuka finished speaking, he handed back Shiraha's two-colored Nikkaku knife. Bai Yu also took the Nikkawa knife back into his hand and put it into its scabbard.

In fact, for the dark green that suddenly ran out, Bai Yu already had his own guess in his heart, and the appearance of this second color may be related to the breath of wood, because the color of wood is green.

"Then I also learned the breath of water, why is the knife not sky blue, but black?" Tanjiro asked suspiciously.

When Tanjiro asked this, Izuka and Taki Zoji could not answer reasonably, and the two could only make a guessful answer.

"Maybe you haven't mastered the essence of the breath of water!" Izuka said without mercy.

"Maybe it's related to your personality!" Shōtaki guessed from the other direction.

When he heard Iron Tsukasuka's words, Tanjiro felt as if he had been stabbed in his heart, and he had studied so hard that he was actually said to have not learned the essence.

And Taki Zuoji's recent words made Tanjiro feel a lot better. Compared to the answers of the two, Tanjiro is more willing to believe in his master, perhaps because of his own personality, so the Nikki knife is black.

While everyone was talking, two crows flew into the wooden house.

"White feather!"

"Tanjiro Stove!"

The crows that flew in were the same ravens used by the Ghost Killer to deliver messages, and as soon as they flew into the wooden house, the two crows called out the names of Shiraba and Tanjiro.