A type of Transformation Magic that transforms the user's right arm into an iron dog. In addition to augmenting the user's hand-to-hand combat skills, the Iron Dog can also smell, bite, and eat things. It has been described as being similar to Gajeel's Magic, and noted to be borderline cute.
- Fairy Tail Manga: Chapter 109, Page 4
- Fairy Tail Manga: Volume 21 Bonus, Guild Cards