Tedd just needed the right context.
And yes, Tedd is immediately sad he has no way of documenting this.
The majority of magic in EGS is very egocentric, by which I mean someone's personality had SOMETHING to do with the specifics of the original spell. Even if Tedd, or someone else, is modifying spells, there's a chance they'll be stuck leaving in some of whatever quirkiness found its way in.
In a way, spells inherit personalities, and you can't necessarily get rid of them when using them as a basis for new spells. Which is tangential to what's going on in the comic, I just somehow got on the topic, and I find it fun.
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