I had a dream of this song from the 1989 film version of The BFG being sung by Princess Luna in MLP sometime last year. I don't know why, but it was beautiful, and it inspired me to rewatch that awesome animated movie of my childhood. Every time I listen to this song now, I'm reminded of Luna and her power to enter the dreams of others.
In fact, I feel this song would fit Luna very well if she ever sung it in the series. I would even at least like to see someone make a fan animation of Luna singing it.

Oh, that's nothing. I keep imagining Pinkie Pie making frobscuttle.

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It would be better if it was Discord.