Darkgnaw

Dark Biter (ダークバイター) is one of four Keyblades that are unique to Terra in the prequel Kingdom Hearts Birth by Sleep. Terra obtains the Dark Biter after successfully defeating the Mimic Master in the Mirage Arena.

Design
The teeth bear a slight resemblance to those of the Fatal Crest Keyblade.The shaft looks a little like the shaft of the Fenrir Keyblade and the Keychain bears a slight resemblance to Master Xehanort's.