If you ask a thousand fantasy authors what makes a good magic system, you’ll get a thousand different answers. I am not going to give you answer one thousand and one. I’m not going to do that simply because the details of your magic system don’t matter. It doesn’t even matter if your system has details. Or if there’s a system at all. Some authors—and their characters—treat magic like a science. If magic is common enough, it seems human nature that it would be studied, codified, even standardized to some extent. Spells are like recipes or language, things to be…