Orikalkum dragons, also known as Dragon dragons, are a type of Metal dragon made from Orikalkum that cannot yet be found in game. The Dragonkin Forcae mentions his desire to create them in the final entry of his journal, but whether he ever succeeded is unknown, as Orikalkum ore is only found on the Dragonkin homeworld. Additionally, it is possible he perished while trying to teach his rune dragons "respect".[1]
In the 30th Postbag from the Hedge, "Dragon dragons" are mentioned as a "conspiracy theory" that Evil Dave and Oziach had come up with[2]. They are also mentioned in the Evil Dave court case by Oziach, referring to them as one of the aforementioned conspiracy theories.