That's the original.
A ritual dagger with a jeweled blade.
The kaleidoscopic gleam sears through my eyes and into my brain.
" "
I understand the instant I see it.
I understand that I can't comprehend it.
All I can imitate is its shape.
I can't analyze its structure and project it.
What kind of a magical theory was it constructed with?
The old man's dagger is still a mystery, even if I use Archer's arm and every last piece of knowledge in heroic spirit Emiya.
It's alien technology.
The old man is embodying general knowledge from a far future, beyond the reach of modern man