Keyblade of Heart
The Dark Keyblade was made by Xehanort's Heartless with the seven Princesses of Heart's Hearts. Under Xehanort's Heartless's control, Riku used it to unlock Maleficent's heart. This gave the witch the strength of her inner Darkness, turning her into a dragon. Sora and friends quickly defeated Maleficient for good while she was in this form, and then proceeded to find the possesed Riku. Once found, Xehanort's Heartless, through Riku, atempted to free Kairi's heart from Sora. However, Sora defeated his possessed friend and used the Dark Keyblade to unlock Kairi's heart himself, turning Sora into a Shadow. Little did Sora know that this created his Nobody, Roxas, as well as Naminé, who was born from both Sora and Kairi. The Dark Keyblade then vanished, turning back into the other six princesses' hearts. To this date, it hasn't been seen in ony other games in the series.
