Ends of the Earth

The Gaia Bane (ガイアベイン) is a Keychain for Terra's Keyblade that is found in Kingdom Hearts II Final Mix and Kingdom Hearts Birth by Sleep. Like Terra's other Keyblades, it is able to shift into multiple forms, including a whip, a jet-vehicle, a spinning-cog weapon, a cannon, and a gigantic Keyblade.

In Kingdom Hearts Birth by Sleep, Terra's Keyblade develops this form after he chooses Riku to inherit the Keyblade. Terra's Keyblade permanently takes this form once his body is stolen by Master Xehanort, and his armor becomes the Lingering Sentiment. The Lingering Sentiment continues to use this Keyblade, even when it attacks Sora in Kingdom Hearts II Final Mix.

Design
In Kingdom Hearts Birth by Sleep, the Gaia Bane retains its Keychain, but in Kingdom Hearts II Final Mix, it has been removed. The Keychain had not been designed by the time the Kingdom Hearts II Final Mix was released. Being an upgraded version of the Earth Shaker, the Gaia Bane features a longer and more extravagant blade with teeth on both sides at the tip of the blade. The hand guard also elongates to form a wing-like shape of sorts. In Birth by Sleep, the blade's length appears to have been slightly decreased.