How to Train Your Hero was a massive fan based crossover created by Deviantart user, Frozarburst. It began sometime in late 2013 and ended on July 18, 2015. The story takes place in an alternate How to train your Dragon continuity, in which the events prior to both Riders of Berk and HTTYD 2 are merged into one. This includes characters -such as Mildew and Dagur- still serving as major antagonists, and others such as Stoick the Vast still appearing in the crossover despite the plot of the sequel. It also takes place several years after The Toon Wars and Justice League Unlimited, in which cartoons and video games now work together to stop an even powerful Brainiac Army. The fan fiction was split into three volumes with three original characters created by the author (one of them being himse