TThe Mœbius pseudonym, which Giraud came to use for his science fiction and fantasy work, was born in 1963. In a satire magazine called Hara-Kiri, Giraud used the name for 21 strips in 1963–64. Subsequently, the pseudonym went unused for a decade.
In 1975 he revived the Mœbius pseudonym, and with Jean-Pierre Dionnet, Philippe Druillet and Bernard Farkas, he became one of the founding members of the comics art group “Les Humanoïdes Associés”. Together they started the magazine Métal hurlant, the magazine known in the English-speaking world as Heavy Metal. Mœbius’ famous serial The Airtight Garage and his groundbreaking Arzach both began in Métal hurlant. In 1976, Métal hurlant published “The Long Tomorrow”, written by Dan O’Bannon.
Arzach is a wordless comic, created in a conscious attempt to breathe new life into the comic genre which at the time was dominated by American superhero comics. It tracks the journey of the title character flying on the back of his pterodactyl through a fantastic world mixing medieval fantasy with futurism. Unlike most science fiction comics, it has no captions, no speech balloons and no written sound effects. It has been argued that the wordlessness provides the strip with a sense of timelessness, setting up Arzach’s journey as a quest for eternal, universal truths.