Noob Saibot's origins are unknown, but he is likely a revenant: a fallen warrior resurrected by the Netherrealm sorcerer Quan Chi to fulfill a dark objective. Noob has been assigned to aid Shao Kahn in his acquisition of Earthrealm. A faithful servant and a recent addition to the Brotherhood of Shadow, he will obey his master, Quan Chi, and complete his mission. But he is biding his time. Noob Saibot has a dark objective of his own.
Quan Chi should never have resurrected Noob Saibot. Nor should he have enhanced his power to defeat Shao Kahn.
The revenant he created had broken free of his control. Noob had secretly formed an "understanding" with a cleric from the realm of Chaos and opened for him a portal to the Netherrealm. Shinnok, Quan Chi and the Brotherhood of Shadow were unprepared as the forces of Chaos overwhelmed them, leaving the Underworld severely weakened. Satisfied with his work, the cleric, Havik, returned to the realm of Chaos. Noob Saibot remained to seize control of the Netherrealm.