Earthshaker

Unreleased

Terra's Keyblade is a Keyblade used by Terra during his quest to find Master Xehanort. Terra is shown summoning his Keyblade differently than how most wielders do. Like Ven and Aqua's Keyblades, it lacks a keychain. These two facts are speculated to be related.

Kingdom Hearts II Final Mix
The Lingering Sentiment uses this Keyblade to fight Sora after they save Disney Castle from the plunging darkness and so gives access to a wormhole in Kingdom Hearts II Final Mix.

During battle, the Lingering Sentiment can change the Keyblade into a whip, a jet-ski like object, a fast spinning cog-like weapon, and a massive cannon, among other formations, like making the Keyblade quadruple in size. It is unknown if Terra will have this ability in Kingdom Hearts Birth by Sleep, or if it only appears in the Lingering Sentiment's boss battle with Sora.