Li Shenron
Legend
I meant in-character of course 
By "during this campaign" I was just trying to say "on screen". If the spell is as common as for instance Magic Missile, I could assume a Wizard has seen it "off screen" even if technically it didn't happen during actual gameplay.

By "during this campaign" I was just trying to say "on screen". If the spell is as common as for instance Magic Missile, I could assume a Wizard has seen it "off screen" even if technically it didn't happen during actual gameplay.
Just a clarification - are you saying you wouldn't require a check if the player has seen the spell cast in one of your campaigns before? Or are you saying some characters port over to other campaigns?