Ends of the Earth

The Ends of the Earth 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. Terra uses this Keychain in order to form his Keyblade Glider.

Kingdom Hearts Birth by Sleep
Terra's Keyblade develops this form after he chooses Riku to inherit the Keyblade. Terra's Keyblade takes this form once his body is stolen by Master Xehanort and his armor becomes the Lingering Will, although it temporarily returns to its Earthshaker form in order to rescue Aqua in the Realm of Darkness.

Kingdom Hearts II
The Lingering Will continues to use this Keyblade, up until it is met by and attacks Sora.

Design
In Kingdom Hearts Birth by Sleep, the Ends of the Earth retains its Keychain, but in Kingdom Hearts II Final Mix, it has been removed, as the Keychain had not been designed by the time that Kingdom Hearts II Final Mix was released. Being an upgraded version of the Earthshaker, the Ends of the Earth 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. The Keychain is a rock fragment similar to the one on the Earthshaker. In Kingdom Hearts Birth by Sleep, the blade's length appears to have been slightly decreased, and the teeth of the blade aren't quite as wide. This is likely due to graphical limitations on the PlayStation Portable, the only platform that Birth by Sleep was released on(if Kingdom Hearts HD 2.5 ReMIX isn't counted.). Therefore, the true size of the Keyblade should be considered the size seen in Kingdom Hearts II Final Mix, in accordance to the lore of the series.

"Ends" can refer to the death or result of something, while "earth" refers to the Latin meaning of Terra's own name. "Bane" is a source of misery. Gaia is a deity in Greek mythology representing the Earth and the mother of the Titans. Her Roman equivalent was named "Terra" or "Tellus". "Gaia" is also a recurring term in the Final Fantasy series. The term "Ends of the Earth" is also a common colloquialism for extreme effort or will, possibly symbolizing the powerful will that Terra possesses.