User blog comment:SkullinBones1/Wizard Battle Royal. Turjan of Miir vs Caleb Widogast vs Raistlin Mejere/@comment-35680048-20191222002924/@comment-39845974-20191222022753

This is how Vancian magic Works. You read the spell formula form a piece of paper during (usually takes a minute or two). It then lodges in your mind for a time. If you speak its name, it it cast and leaves your mind. You then forget the spells formula and must read it over again. While he can read it again and then us it again later on, he can't just do so freely in battle. I'm sorry if I came across as vague or some shit.

I say at all points that in Vancian magic, a spell only has a single usage. While you can read the Formula and learn it again, you can't do so easily on the fly. Memorizing a spell is sorta like a mini ritual, it taking a minute or two of you reading out a long list of numbers and words.