Unbreakable Chains

"Unbreakable Chains" is a musical theme by Takeharu Ishimoto that appears in Kingdom Hearts Birth by Sleep. It is one of the boss themes of Vanitas.

Ventus's Story

 * Battles
 * Dive to the Heart:


 * Cutscenes
 * Dive to the Heart: "Unfinished Union"

Kingdom Hearts Union χ

 * Medals

Composition
"Unbreakable Chains" is five minutes and 21 seconds in Kingdom Hearts Birth by Sleep.

The track is a climactic arrangement of Vanitas's primary boss theme, "Enter the Darkness". As such, it incorporates elements of various themes featured in "Enter the Darkness": "", "", and "".