Can you give any advice to fantasy writers on creating magic systems?
The most important thing about a magic system is what it can’t do, not what it can. The limitations of a magic system are commonly what drives the plot in a fantasy novel. One novel I’m working on involves a magic system where individually, people don’t have enough magic to do anything major. However, you can give your magic to someone else, and if you can get around 50 people’s magic, then you can do something interesting. But giving away your magic makes your world that bit darker. In such a world, it doesn’t actually matter then what the magic does; it’s more about whether you choose to sell yours or try and get someone else’s.
The second point is to consider how the magic system interacts with the setting. How does it affect the economics, social structures, and religious make-up of the world? For example, in the Wheel of Time, the clear gender difference in the magic—men go mad and women don’t—has affected the whole pattern of gender relations in the world in ways that can seem very bizarre to us. It’s also important to give magic a visual or sensory component. It’s tempting to have all the magic played out in the minds of the mages, but this can be boring to read.
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