"I do remember." It wasn't so long ago, for him. He'd never wanted to teach Shirou magecraft in the first place. What kind of a teacher was he, anyway? What did he know?

He's quiet for a moment, not wanting to risk doing something that might cause the openness in Archer's voice to shut off again. He'd meant to ask whether that was Archer's special skill as a Heroic Spirit, if that was how he fought, but he hasn't forgotten Shirou's magecraft.

"Maybe I was mistaken." It wouldn't be the first time. "Usually it is useless."