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If it wasn't Grapp who came to save Harry and Hermione.How to Train Your Dragon/Defend the League/HP originally set crossover.Although it was said at the beginning that it was set in the same setting as "The Roaring Letter", Professor Hiccup's brain hole couldn't go on...so it became this article.The plot has nothing to do with "The Roaring Letter".Similarly, in order to unify the style of the article, Hiccup Haddock = Hiccup Haddock/Little Hiccup Haddock, Hic (nickname) = Hiccup, Hiccup the Useless = waste Hiccup, Jack Frost = Frost Jack, Toothless = toothless. North=North. HP adopts humanistic translation.Original: How to Train Your Dragon, League of the Guardians, Harry Potter Rating: All Ages