“Leaving aside that opinions are split on whether M. Levi was the kind of mage the Association would acknowledge... The basis of producing a Noble Phantasm is grafting a ‘legend’ onto a weapon. You’re not talking like a man who can manage ‘something that tricky.’”
“...Well, there is a chance that I might mess with their destinies. You’ll have to let that much slide. I’ll do my best to make sure I twist them for the better.

Fate/Strange Fake: Volume 4, Chapter 10 ("Day 2")