Raven Tail is a guild founded by Iwan Dreyar, the son of Fairy Tail Guild's master, Makarov. He formed it for the sole purpose of destroying Fairy Tail. It is stationed in a hollowed out mountain. Raven Tail's headquarters seem to be located in a rocky wasteland. The building seems to be part of a mountain. Before it became a Legal Guild, Raven Tail was a powerful Dark Guild. However, unlike all the other Dark Guilds, Raven Tail worked independently, which is a testament to its great strength.