Mägo de Oz are a Spanish folk metal band from Begoña, Madrid formed in mid-1988 by drummer Txus di Fellatio. The band became well known for the strong Celtic feel to their music strengthened through their consistent usage of a violinist and flautist. The name for the band was chosen, according to founding member Txus, because "life is a yellow brick road, on which we walk in the company of others searching for our dreams." On the 26th of October, 2018, the band played a special concert to celebrate their 30th anniversary, playing with a symphony orchestra at the WiZink Center in Madrid.

A metal umlaut is a diacritic that is sometimes used gratuitously or decoratively over letters in the names of mainly hard rock or heavy metal bands—for example, those of Blue Öyster Cult, Queensrÿche, Motörhead, the Accüsed, Mötley Crüe and the parody bands Spın̈al Tap and Green Jellÿ.