Dragonize

Dragonize is an Etherious Dragon Slayer ability.

Description
When the user enters the Dragonize state, they effectively become half-Dragon, with half their body becoming covered in scales, growing a single wing, a horn and also claws and talons. This ability appears to be linked to the users status as an Etherious, as Animus recognised Natsu Dragneel as E.N.D. when he achieved this state.

Abilities
Dragonize greatly increases it's users abilities, in Natsu's case changing his Fire Dragon Slayer Magic to possess blue flames and making it potent enough to defeat a dragon who had been further empowered by the Dragon Cry.