I just read a post on Brandon Sanderson’s blog about magic systems.

The Cost of Magic, plus Superman

If you are, or ever plan to write a story that has magical elements, you simply must read this post. Not optional.

A little something to chew on: when you watch Superman fight a bad guy, it’s cool, but it’s not very tense, is it? So why is the Superman story interesting or compelling? Read the blog post.