His purpose in coming to Einzbern Castle was not to eliminate Artoria, but to obtain information on Avalon.
Now that Artoria had obtained Avalon, if Ailin wanted to analyze it, he could only do as he had on the banks of the Mion River before—complete the analysis of Avalon during a battle with Artoria.
To analyze Avalon faster, he had to force Artoria to unleash Avalon's power.
After all, Avalon was not like Excalibur; it could not be analyzed through the clash of their weapons.
In that case...
With that thought, Ailin recited the chant for his Zanpakuto's Bankai.
"This body is made of steel."
"Blood is iron, and the heart is glass."
"..."
"Bankai—Unlimited Blade Works!"
Boom!
The scene that had previously appeared in the courtyard of Einzbern Castle appeared before Artoria once more.
A crimson sky, the outline of enormous gears, black-and-red earth, and countless Zanpakuto embedded in the ground.
"King of Knights, welcome to my world!"
"For the battle ahead, I hope you will show me your strongest form."
"Otherwise, don't blame me if you die!"
Standing atop Sword Hill, Ailin lowered his head and spoke to Artoria on the open ground in the distance.
Then, beneath Artoria's gaze, Ailin raised his right hand.
"Bzzzzzz..."
With Ailin's movement, every sword embedded in the ground throughout the Inner World instantly resonated with him.
Then, the Zanpakuto flew up from the ground, shining like a field of stars in the sky of the Inner World.
Black-and-red lightning spread across the blades.
"Whoosh, whoosh, whoosh, whoosh, whoosh..."
As Ailin swung his hand downward, the Zanpakuto in the sky of the Inner World transformed into streaks of black-and-red lightning and crashed down upon Artoria.
"Haah!"
Faced with the rain of Zanpakuto hurtling toward her like lightning, Artoria showed no fear. Instead,