Fatal Crest

The Fatal Crest is a Keychain for Sora's Keyblade that appears in Kingdom Hearts II.

Design
The neck of the Keyblade appears to be that of a skeletal dragon, of which still has life in some of it. Unlike most Keyblades, this Keyblade features a curved neck. The handle is the landmark that defines The Underworld and is seen on the river Styx. The token is the Hades Cup.

Gameplay
The Fatal Crest gives the largest magic bonus of any Keyblade, making it good for usage with Wisdom Form. Its usefulness for this is undercut by the Winner's Proof Keyblade in Kingdom Hearts II Final Mix, which boasts of slightly more powerful stats. However, its Berserk Charge ability means that if Sora's MP is charging while wielding this Keyblade, he cannot perform combo finishers, so Upper Slash and Horizontal Slash are good ways to finish off bosses with this ability active.

Play Arts Figures
The Valor Form edition of the Play Arts Figures comes packaged with Fatal Crest as one of the Keyblades