Zancrow

Zancrow is a member one of the Dark Guilds, Grimoire Heart.

S-Class Trial arc
He was first shown on airship, which belongs to his guild. He questioned the strength of Fairy Tail and said that he would change anyone on his way into ash.

Magic and Abilities
Unnamed Magic It was shown that, when Zancrow get excited, he covered himself with something like black flames or ash.

Trivia

 * He is identical to Natsu as when he gets excited, he covers he body with ash instead of flame. Also, he looks similar and his magic is similar.