Uuh, I just thought of something, maybe I'm a little slow and this is pretty obvious to you guys, but nevertheless I wanted to make sure whether this would be a legal move (somehow I doubt it):
The Rules clearly state, that cards that you haven't played this round, come back into the book at the beginning of the next Planning-Phase. Now I wonder why this is emphasized so much. Why then, and not at the end of the round (which would be a far more obvious rule)? Or is it perhaps because after I'll get new Mana in the next Channeling Phase I may flip my Quickcast-Marker in the Ready Stage to play that certain card, which is still lying before me?
Or maybe I'm just paranoid; still, up until now, for everything written in the Rules there was a reason, why it was spelled out exactly the way it was. So in this certain case it just struck me as odd, that they would emphasize a tiny (otherwise pretty obvious) detail this much.