One Winged Angel was composed by Nobuo Uematsu for Final Fantasy VII in 1997 as the theme for Sephiroth, the game's one-winged antagonist. The Advent Children film version from 2005 reworked it with a full orchestra, choir and rock elements, and that heavier arrangement is the source of this clip. Clips of the theme spread through gaming forums, YouTube edits and soundboards because its opening chant instantly identifies Sephiroth, and creators now reuse it whenever any character needs an intimidating, final boss introduction.