If Haku mastering the First Form, Water Surface Slash, after watching his demonstration just once had been hard for Sakonji Urokodaki to accept, then the sight before him now left him utterly dumbfounded.
If he hadn't been wearing his Tengu Mask, the exaggerated expression on his face would have surely wiped away all the dignity he had built up over the years.
"Uh..."
Haku was a little surprised, too.
He had just recalled the way Giyu Tomioka, the Water Hashira, had swung his sword during the battle on the island. He'd gotten lost in the memory and, without realizing it, used Ice Release Chakra.
There was no such energy as Chakra in the Demon Slayer World, after all, so his act of freezing a waterfall solid with a single strike had deeply shocked Sakonji Urokodaki.
It took a long while for Sakonji Urokodaki to recover. Then he asked Haku, "H-how did you do that?"
As he observed Sakonji Urokodaki, Haku replied, "I'm not really sure, either!"
Sakonji Urokodaki hurried over to the frozen waterfall, leaped up, and plunged his long sword into the cliff beside it. Hanging in midair by the hilt, he reached out to touch the ice crystals, which still gave off waves of cold. His expression turned grave.
It was obvious.
This wasn't some kind of illusion. It was real ice!
After landing, Sakonji Urokodaki pointed his sword at Haku and demanded, "Who are you, really? Was that a Blood Demon Art you just used?"
A swordsman in the Demon Slayer Corps couldn't do something like that. At least, he, a former Water Hashira, couldn't.
And in his experience, demons could use their Blood Demon Arts to create all kinds of supernatural things. He immediately became wary.
When Sakonji Urokodaki pointed his sword at him, Haku was