The Day of the Dragon

Summit's dragon Fury lays an egg just before a group of Dramen and Gremwings attack. Summit is able to fight by himself, but is forced to leave Fury, and her egg is successfully stolen by Nocturna, who was trying to take all the ones she could. Dreadwing has Gangrin use it with a mutating formula he invented, so when the Dragon Flyz go to rescue the egg, they are greeted by an enemy they can't return fire on: Fury's newborn cub, born a monster who serves Dreadwing.