Hero's Crest

The Hero's Crest is a keyblade from Kingdom Hearts II. This Keyblade replaced the Olympia from the first Kingdom Hearts.

Acquisition
Sora gets this after defeating the Hydra in Olympus Coliseum.

Appearance
The blade, hand guard, and tip are similar to Greek architecture. The teeth seems to be a star of some kind. The keychain is the symbol of the Gods of Olympia.

Trivia

 * The name is similar in the Fire Emblem series, when promoting Myrmidons, Mercernaries, and Fighters using the crest of the same name.