Master's Defender

Unreleased Eraqus's Keyblade is a Keyblade used by Master Eraqus in the game Kingdom Hearts Birth by Sleep.

Design
Master Eraqus's Keyblade has a smooth, cylindrical, grey shaft that tapers outward at both ends. It has a boxy guard, made up of two small, light gray boxes and copper rods. The base of the guard connects to the handle, and both sport several small indentations lining them. The teeth are in the shape of an "E". His keychain is made of of several simple chain links and its token has the same symbol that appears on his, Ventus's, Terra's and Aqua's clothing.

Story
In the final episode of Kingdom Hearts Birth by Sleep, Aqua returns with Ventus to the start of their journey, the Land of Departure, the world now shrouded in darkness. There they find Master Eraqus's Keyblade, the weapon left behind in same place since Eraqus's death at Master Xehanort's hand. Aqua uses the Keyblade to create the Chambers of Repose and Waking, and brought the blade with her upon departure. Perhaps due to her unfamiliarity with the weapon, Aqua chooses not to use it in combat against Xehanort.

At the end of Aqua's scenario, she lost her own Keyblade in the Realm of Light, and is shown wielding this Keyblade in the Realm of Darkness, presumably still wielding it in the present.