You are welcome to write fan-fiction of any of my worlds, so long as you do not do so for profit. If you do write fiction based in any of my worlds, I would love to see it.
While you can feel free to write fanfic in my worlds, I will feel free to write things that make it non-canon if I need to. If you make a warlord of Chicago and I need to blow Chicago up, for instances, Chicago is getting blown up.
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