Silverwing

Silverwing is a giant ice bird boss, created as a prank boss by the Administrators, which appeared during the Second Event. It guarded the eggs of Syrup and Oboro at the top of the mountain summit. It first faced Chrome and his group and effortlessly defeated them. However when Sally and Maple arrived to said area they put up quite a fight against it. After that it was then beaten once and for all by Maple as she used Hydra on it and upon defeat the item that it dropped will be one of its feathers (for the anime) and talons (for the manga).