|Fairy Tail Gaiden: Rhodonite|
フェアリーテイル 外伝 ロードナイト
Fearī Teiru Gaiden: Rōdonaito
November 18, 2015 – Ongoing
The story centers around Gajeel Redfox. Upon returning from a week long mission, Levy and the rest of Team Shadow Gear discover a council representative looking for Gajeel. The reason being he apearently help with the escape of a criminal named Mash. However most of Fairy Tail is under the impression this is true, as no one has seen Gajeel resently. Gajeel comes forward to explain he isn't responsible. As the representative leaves, "Gajeel" is revealed to be Mira using her transformation magic, as requested by Pantherlily. The reason being, the last Lily saw his partner was three days prior, and the only clue to his disappearance was a wanted poster of the convict in question.  Upon learning from Juvia, that crime is up in Denish, Gajeel's hometown before his days in Phantom Lord, Pantherlily and Levy go out to find him. However Gajeel is shown to be with Mash, having his guild mark wrapped up in bandages.
Written and illustrated by Kyōta Shibano, Fairy Tail Gaiden: Rhodonite is a weekly spin-off manga first serialized in the Magazine Pocket smartphone app on November 18, 2015, which is where the series has continued its serialization since then. Currently, there are 2 chapters in total.
List of Chapters
Iron Dragon Slayer Magic (鉄の滅竜魔法 Tetsu no Metsuryū Mahō): A version of Dragon Slayer Magic that gives it's user, Gajeel, the power of iron, allowing him to incorporate the element of iron into his body and thus change parts of his body or entirely it to iron. 
- Iron Dragon's Club (鉄竜棍 Tetsuryūkon): The user turns his hand into an iron club which is used to attack the enemy with high power. 
Fairy Tail (妖精の尻尾, フェアリーテイル, Fearī Teiru): Fiore's strongest guild, in which Gajeel belongs to.