User blog comment:HardyGal/Twisting myths/@comment-25052433-20150910172050

I suppose it depends on what you mean by myth/monster. If you're talking about something like Slenderman, I would suggest against it, sense that would violate spin-off policy. However, if you're talking about something like The Boogeyman, Bigfoot, or some Lovecraftian type fiend, I am sure that would be fine. Just make sure you give credit to any original authors if you borrow their monster for your story, and I think you'll be good to go.

Best of luck and I look forward to seeing what you come up with.