Magic is another common RPG element in the series. The method by which characters gain magic varies between installments, but is generally divided into classes organized by color: "White magic", which focuses on spells that assist teammates; "Black magic", which focuses on harming enemies; "Red magic", which is a combination of white and black magic, "Blue magic", which mimics enemy attacks; and "Green magic" which focuses on applying status effects to either allies or enemies. Other types of magic frequently appear such as "Time magic", focusing on the themes of time, space, and gravity; and "Summoning magic", which evokes legendary creatures to aid in battle and is a feature that has persisted since Final Fantasy III. Summoned creatures are often referred to by names like "Espers" or "Eidolons" and have been inspired by mythologies from Arabic, Hindu, Norse, and Greek cultures.
Several video games have either been adapted into or have had spin-offs in the form of manga and novels. The first was the novelization of Final Fantasy II in 1989, and was followed by a manga adaptation of Final Fantasy III in 1992. The past decade has seen an increase in the number of non-video game adaptations and spin-offs. Final Fantasy: The Spirits Within has been adapted into a novel, the spin-off game Final Fantasy Crystal Chronicles has been adapted into a manga, and Final Fantasy XI has had a novel and manga set in its continuity. Seven novellas based on the Final Fantasy VII universe have also been released. The Final Fantasy: Unlimited story was partially continued in novels and a manga after the anime series ended. The Final Fantasy X and Final Fantasy XIII series have also had novellas and audio dramas released. Two games, Final Fantasy Tactics Advance and Final Fantasy: Unlimited, have been adapted into radio dramas.