After being transported into the Dark Margin that is connected to the Realm of Darkness by the Demon Tide, you were left unconscious for hours. You later woke up, finding yourself on a shore with a sea next to it. Rocks were everywhere, some big enough to be considered arc.

The Demon Tide appears out of the ground. You unleash your Keyblade, the weapon materializing in your hand. You watched the Shadows that make up the Heartless climbing on each other and falling, repeating their process over and over again.

The Demon Tide finally makes a move on you, turning its upper "body" to try and crush you, the Shadows moving in a synchronized manner.