After Dagur attacks Berk, Astrid agrees to train a group of back up dragon ri...
Dragons: Race to the Edge
Season 2 Episode 4: Bad Moon Rising
When a strange creature bites Tuffnut, he believes he will turn into the legendary Lycanwing Dragon when the moon is full. Hiccup and the other riders must save him before Tuffnut goes off to live amongst the dragons forever.