Enter the Darkness

"Enter the Darkness" is a musical theme by Takeharu Ishimoto that appears in the  series. It is the boss theme of Vanitas.

Ventus's Story

 * Battles
 * Keyblade Graveyard:


 * Cutscenes
 * Keyblade Graveyard: "The Masked Boy's Keyblade", "Another Keyblade Wielder", "Peas in a Pod", "Kingdom Hearts"

Aqua's Story

 * Battles
 * Radiant Garden: Vanitas
 * Neverland: Vanitas


 * Cutscenes
 * Radiant Garden: "The Boy in the Mask Appears"
 * Neverland: "Vanitas Returns"

Kingdom Hearts III

 * Battles
 * Land of Departure: Vanitas
 * Keyblade Graveyard: Vanitas


 * Cutscenes
 * Land of Departure: "An Uninvited Guest", "An End to Slumber"

Kingdom Hearts III Re Mind

 * Battles
 * Garden of Assemblage: Vanitas's Recreated Data

Composition
"Enter the Darkness" is four minutes and 44 seconds in Kingdom Hearts Birth by Sleep, while "Enter the Darkness -KINGDOM HEARTS III Version-" is five minutes and 43 seconds.

The track incorporates elements from "", "", and "", representing Vanitas's innate connection with those three wielders. In addition, "Unbreakable Chains", the final boss theme of Vanitas in Ventus's story, and "Dual Hearts", a cutscene track that accompanies Vanitas's return in Kingdom Hearts III, are both rearrangements of "Enter the Darkness".

Official websites
"Enter the Darkness" plays as the background music for the Kingdom Hearts Birth by Sleep Final Mix page on the Square Enix website.