"Supreme King Dragon", known as "Supreme King Servant Dragon" (覇王眷竜Haōkenryū) in the OCG, is an archetype of mostly DARKDragonmonsters used by Z-ARC in Yu-Gi-Oh! ARC-V. It is a sub-archetype of the "Supreme King" archetype.
"Supreme King Dragon" monsters appear to be corrupted versions of the Four Dimensional Dragons (with the exception of "Darkwurm", which, anyway, resembles a smaller version of "Supreme King Z-ARC"), and are characterized by having glowing green bands with orange blotches running over their bodies just like "Supreme King Z-ARC" (only in the anime).