There's a much simpler answer:

Seika: I presume you're familiar with the House's latest line of arms and armament? “Eikonic,” they call it. Fashioned in the image of those legendary items supposedly imbued with the essence of primals themselves, et cetera.
Seika: Simply put, they're reproductions. Damn fine ones, to be sure. All credit to the House's artisans. Nevertheless, with the right materials─courtesy of the Illuminati─I can improve upon their work.