The Obliterator was an alien engine of destruction, its creators and origin remain unknown. This destructive juggernaut was unleashed on the planet of Z'lyztaya, where it killed all the inhabitants of the planet, with the exception of Quinn, Yssa
, their hatchling M'rynda, and the half-breed navigator Zed
, who were off planet. These survivors were tracked by the Obliterator's mother-ship to the planet Earth.