Keyblade

A keyblade is a bladed weapon that resembles a key. This weapon originates from the Kingdom Hearts video game series and is often Mugen's weapon of choice. Keyblades have a variety of functions such as unlocking containers and doors, firing magical beams, and stabbing. It is also possible for one to dual wield keyblades under special circumstances - an ability Mugen displays often. Mugen's keyblades of choice appear to be the Oathkeeper and Oblivion.