Tonton Streaming DreamWorks Dragons (2012) S1E14 - What Flies Beneath

A rogue dragon – a Whispering Death – shows up in Berk, tearing up the village. He's on a mission to find Toothless and settle a score. Despite Hiccup's efforts to help, Toothless insists on facing the dragon alone. But unlike their past battle, Toothless's inability to fly my prove to be his undoing.