Manga readers are surely familiar with the "Fairy Tail" story. In fact, Fairy Tail is the name of an organization for powerful wizards into which Lucy wants to get accepted.
Here, however, we suggest you read a spin-off story revolving Gajeel Redfox. Its author is Kyouta Shibano. This is not all, because this volume is a 2018 Loot Crate Exclusive. This means the art on its cover is exclusive to this edition from 2018.
The volume is called Rhodonite and has a total of 17 chapters. The only way to learn a bit more about Gajeel is to get the book to read it: afterall, it will be a special treat thanks to the art on the cover!