Flucifer, also known as the Dark One, is the final boss in Dragon Quest Heroes: Rocket Slime. He is an ancient demon that awakens when an unaware Gluttonella plays Don Clawleone 's flute just for fun. He proceeds to possess the plobfather and gets into a giant dragon-like machine (that may be the embodiment of Flucifer itself) that the heroes must bring down to restore peace.