User blog comment:Mmpratt99 deviantart/How Do I Get the Right Balance Magic Realism and Fantasy Without Falling Into the Ridiculous?/@comment-10789912-20160129064154

You do that by making sure that it has at least some level of realism. Even though concepts like magic are completely fictional with absolutely no possibility of existing, you can create the illusion of possibility by, say, making a law of nature to explain these events.

For instance, magic in The Witcher is actually the result of essence of a parallel universe crossing over the one the game takes place in in the grand scheme of things, which, every time it happens, allows things to cross into their universe. The first time it was magic, the second time it was the wild hunt.

Go crazy and create your own reality, maintaining the illusion of reason on some level.

That'll pretty much keep anything you write from being cliche or over the top fantasy.