[quote=@Over Illusion]By designating a legend, he is able to make a single-word change into its nature, altering a core aspect of it and replacing it with something else. As it is an alteration to the [I]a priori[/I] information itself, the nature of the existence itself is irrelevant.
Additionally, he is not freely able to alter legends. Rather, he can only change a single component of the legend in question, altering a given word within the legend into the word "Constitution". The United States Constitution is the one thusly referred to in this case.
[/quote]

That is a pretty weird NP. Can it straight up turn Servants into copies of the Constitution? Or is it only objects and details surrounding them? Can it transform NPs into the Constitution, and if so, do they still retain their abilities aside from their shape?

...Actually, the image of Achilles being forced to ride into battle atop a copy of the Constitution being pulled by three horses is kinda funny to me, if a bit out-of-place in an actual Grail War context.

Also, if the prana cost is low, does that mean it can be used repeatedly on a singly target over a short timespan, rapidly turning every aspect of their life into the constitution?