Armorwing

The Armor Wing is a large long-necked dragon that lacks natural armor but steals swords, shields and other metal objects to create metallic scales to protect its soft body. It was first seen on the Race to the Edge Season 2 Preview on nerdlist.

Trivia

 * The Armor Wing looks like a Boneknapper without its bone armor. The head, eyes, horns, teeth, claws, wings, body, and tail all look similar.
 * The Armor Wing is the second dragon that coats its body with metal, the first is the Sword Stealer.
 * In an email from School of Dragons, it was called the "Armorwing", but was referred to in the article as "Armor Wing".
 * It's the first franchise dragon with an "A" at the beginning of it's name.
 * The Armor Wing looks like a mix of a Monstrous Nightmare and a Boneknapper.