The universe begins with Demon Slayer: Kimetsu no Yaiba

After the Iron Tomb finished drinking tea, they couldn't wait to see what color Shiroha and Tanjiro's Nichirin swords could turn into.

"Hurry up and take your sword out and take a look! Your names are engraved on the scabbard! Look which sword is yours!" Iron Tomb urged, waving his palms.

Hearing this, Tanjiro couldn't wait to take the Nichirin sword engraved with his name in his hand.

Bai Yu, who owned the Demon Slayer Sword, was not very excited about this, but out of respect for the sword forger Iron Tomb, Bai Yu still took his Nichirin Sword over.

"The Nichirin Sword is also known as the color-changing sword. It changes color according to its owner." Iron Tomb continued.

Hearing this, Tanjiro couldn't help but pull out his Nichirin sword, and then Tanjiro looked at the blade carefully.

A few seconds later, the golden blade of the Nichirin sword in Tanjiro's hand gradually turned black from the end of the sword.

The dark color spread to the entire blade, and Tanjiro couldn't help but feel that it was very magical.

"black!"

Iron Tomb couldn't help shouting, with a hint of dissatisfaction in his tone, and his whole body was shaking uncontrollably.

"Is it black?" Hinataki Sakonji murmured indifferently.

Seeing how nervous the Iron Tomb was, Tanjiro couldn't help but become nervous, and then asked: "Hey~ isn't black bad?! Isn't it unlucky?"

At this time, Nintaki Sakonji explained to Tanjiro: "No, that's not the case, it's just that black is not common."

Finally unable to bear it any longer, Iron Tomb shouted frantically: "I thought I could see a bright red blade! Damn it!"

After shouting, Iron Tomb jumped up, hugged Tanjiro, and then locked Tanjiro with a locking technique.

Tanjiro immediately did not dare to make any big move, and could only shout: "It hurts, it hurts~ Mr. Steel Mound, please calm down, how old are you, and you still act like a child!"

Hearing this, Iron Tomb was not shy at all and replied very seriously: "Thirty-seven!"

Bai Yu ignored them, but curiously pulled out his Nichirin sword. Bai Yu was also curious about what color his Nichirin sword would be.

As Bai Yu pulled out the Nichirin Sword from its sheath, a few seconds later, Bai Yu's blade began to change color.

I saw that Bai Yu's blade appeared in two colors: aqua blue and dark green. The two colors appeared unevenly and collided with each other.

Finally, under the mutual extrusion of dark green and sky blue, the sky blue part was squeezed into a wave shape on the blade, and the other side of the blade was covered with dark green.

"Two colors!"

Seitaki Sato, who was sitting aside, was rarely shocked when he saw the color of the White Feather Nichirin Sword recently.

When Steel Tomb heard what Nintaki Sakonji said, he immediately turned his attention to Shirayu's Nichirin Sword.

After seeing Bai Yu's two-color Nichirin sword, Steel Tomb suddenly let go of Tanjiro, and then quickly approached Bai Yu's face, carefully looking at Bai Yu's two-color blade at close range.

"There are actually two colors! What's going on?" Iron Tomb was a little confused.

"Please show me the knife!" Iron Tomb couldn't help but feel excited, and wanted to take the Nichirin Knife from Bai Yu's hand.

Bai Yu had no objection and took the initiative to hand over the Sun Lun Knife.

At this time, Nintaki Sakonji couldn't help but come over and study Shiroyu's two-color Nichirin sword with Steel Mound.