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Dreamer
Magic systems impact stories to the core, effecting the fundamental laws of the world, bringing abstract concepts together with the real. Yet the range of forms that a magic system can take is enormous; there being so many cool things that authors can and have done (though there are even more stories that have been spoiled by the use of magic as a crutch or an easy solution to a problem). Since I am currently drafting rules to the magic systems in my WIP I am interested in hearing some examples of interesting systems that you've read or created yourselves. Perhaps you've drafted one that you're particularly proud of or maybe there's a book you've read that does something with magic that you've never encountered elsewhere?