Many years ago, when I made my new wizard, I chose Myth as my secondary school. At this moment in time, I honestly regret it. I wish I could trade the spells for training points and receive spells from a different school. I would love this to be added to the game. I'd rather have Death spells rather than Myth spells. Thank you.
Right now, the only way to get buy your training points back involves selling your arm and leg to the registrar in Golem Court. He makes you buy all the points back, or no deal. Not even remotely fair to charge that much in my opinion.