DreamWorks Dragons (2012)

S02E06 Fright of Passage

Hiccup steps in to assist Astrid as she confronts her dread of the fearsome Flightmare, a spectral dragon that left her uncle paralyzed with terror, tarnishing her family's reputation. Together with Fishlegs, they uncover surprising truths about the Flightmare that reveal it’s not quite what it seems.