Hm, well I think that I should clarify how I'm going about the magic system a bit.
First off, I'll be giving each caster an inherent spell (or two) they can use any time by pitching cards they don't want. For instance, raising uncroaked for croakamancers and speeding up production for turnamancers. By doing this, I hope to feel free to make card effects as specific as I want without worrying if they'll ever be useful.
I've already given an example for the "punny name" approach for designing cards. The aim of this is supposed to be coming up with all sorts of unusual -but useful- spells that might not be considered otherwise (for instance, the "Turn the Tide" card). I went a bit overboard with this last night. It's ok to keep sending the 'silly' card ideas, though; you never know when one might actually turn out to be useful. Also, the pun doesn't need to be in the name, for instance the potential croakamancy spell "Rain of Frogs".
What's more important than names, though, are card effects. I guess this will really have to wait until I get around to writing the actual rules & mechanics.
"The Wizard is Charlie!"