The Deringer is ½bladekind and can also be used by Dave. It is modeled after the broken Narsil once wielded by Isildur to slice off the fingers of Sauron in The Lord of the Rings. This sword is already broken and can only be equipped by someone holding a ½bladekind Specibus.
At some point between his loss to Jack Noir and the end of the Reckoning, Davesprite obtained a complete, unbroken variant of the Deringer from Hephaestus using the Broken Caledfwlch and the Forge. It later appeared before Rose and Dave, embedded into the base of Derse's moon-binding chain, teleported there through Jadesprite's powers. In his attempt to retrieve it, Dave broke it, turning it into the ½bladekind form, and used it to break the chain anchoring Derse's moon.
The name is a reference to the Derringer, a type of muzzleloading pistol and a pun on 'de-ringer', a reference to how Narsil was used to remove the One Ring from Sauron's hand; mirroring this, the Royal Deringer is also used by Jack Noir in [S] Jack: Ascend. to deprive the Black Queen of her ring, killing her and opening the way for Noir to usurp the throne. [Source: wikia]
You can download the papercraft model template here: MS Paint Adventures - Broken Royal Deringer Free Papercraft Download