User blog comment:B214/Volume 21 info & spoilers/@comment-83.7.233.159-20160420144354/@comment-1359322-20160424040557

@Swampy, the power of magic doesn't derive from power but the equations or formula. Vasco showed it in Volume 19. So long as the formula is flawless, it'll be powerful.

"“This so-called magic, is a calculation — so, using the theory behind its formula to oppose it, it’s possible to cancel them out or destroy them. Especially the techniques of young magicians, they’re unrefined and not concise. As long as a slight flaw is found, it’ll be completely useless — as long as its structure is known, it can be disintegrated with power.”"

Also while it's not bad to quote from the story, in that very same volume (V4), Ddraig also said this:

"[—Ophis. That’s a nostalgic name.]

So, who is he? That guy?

[He’s the strongest of the Dragon tribe.]

Stronger than Ddraig and the Vanishing Dragon?

[Yeah, because he’s stronger than God as well. He’s the only existence that God couldn’t take on carelessly. He’s a true monster with power equal to infinite.]

“Seriously!? So there was still a dragon stronger than you and Albion!”

[He’s the only one. The only one who exceeds us. He’s the strongest existence in this world.]"