Osiris

Once a powerful System Lord among the Goa'uld, Osiris and his Queen Isis were betrayed by his brother Setesh. They were removed from their hosts and placed in statis jars for thousands of years. Osiris was eventually awoken when Sarah Gardner opened the jar, and he took her as a host. Taking advantage of the "ravorable conditions" following the deaths of Apophis and Cronus, Osiris built up quite a powerful army. Eventually, Anubis offered him a place of authority in his growing empire, and Osiris served as his delegate to the Council of System Lords, where he persuaded the others to grant Anubis the rank of System Lord. After Anubis' fall, Osiris attempted to use the subconcious memories Daniel Jackson held of his time while ascended, so as to locate the Lost City. SG-1, however, managed to trap Osiris, and remove him from Sarah Gardener.