An ancient threat long thought to be the stuff of myths and legends becomes a reality and that legend sets its sights on Equestria. Hungry for destruction and hellbent on killing everything in its path, it will stop at nothing to get what it wants. But an unexpected defender stands in his path and is more than willing to defend Equestria with his life.
Side notes: Godzilla does not appear in this story. This story is a 'what if' story where Equestria has its own King Ghidorah to deal with.
Yes, Twilight is a unicorn in the picture. No, she is not in the story; she's an alicorn