Mägo de Oz (Spanish for Wizard of Oz, with a metal umlaut) are a Spanish folk/heavy 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."

In 1992, the band were finalists in the Villa de Madrid contest. Then they went on to achieve great success in Spain, and in 1995, were declared Revolution Rock Band. Around 1996, the band's definitive line-up began to emerge; that same year, they began recording the rock opera CD, Jesús de Chamberí, which was produced by Alberto Plaza and Mägo de Oz. The CD was released in 1996, through their former label, Locomotive Music.