and their technology. While Earth builds its first interstellar spaceship (the Prometheus) in seasons Season 6 and Season 7, Anubis creates an army of almost invincible Kull Warriors and wipes out or subordinates most of his adversaries amongst the System Lords. In the Season 7 finale ("Lost City"), SG-1 discovers a powerful weapon in an Ancient outpost in Antarctica that annihilates Anubis's entire fleet and also sets the stage for the spin-off series Stargate Atlantis. Ba'al subsumes much of Anubis's power in Season 8, while Anubis, who survived the destruction of his fleet in a disembodied form, quietly begins to re-assert his influence. Human-form Replicators begin to conquer the System Lords, but SG-1 finds and adjusts an Ancient weapon to destroy all Replicators throughout the galaxy. Near the end of Season 8 ("Threads"), it is revealed that the benevolent Ascended being Oma Desala (Mel Harris) is responsible for Anubis's original ascension. When she engages Anubis in an eternal stalemated battle on the Ascended plane to prevent his acting on the mortal plane, the Replicators and most System Lords have already been annihilated and the Jaffa win their freedom from Goa'uld rule. Ori Arc The original SG-1 team disbands after the events of Season 8, but slowly reunites under new team leader Lt Col. Cameron Mitchell after the SGC inadvertently draws the attention of the Ori to the existence of sentient life in the Milky Way; the Ori are revealed to be a faction of ascended Ancients residing in another galaxy that are diametrically opposed to the Ancients' belief in strict noninterference in the lower planes of existence, sapping the energy from untold billions of "lower beings" (non-ascended sentient beings) by means of their worship in a religion called Origin. While the Ori send enhanced human beings named Priors to the Milky Way to convert the galaxy to Origin, Ba'al and some minor Goa'uld infiltrate Earth through The Trust (a coalition of rogue NID operatives) to rebuild their power. At the end of Season 9 ("Camelot (Part 1)"), the Ori begin an evangelistic crusade with their warships and effortlessly wipe out the combined fleet of Earth and its allies. The leader of the Ori, Adria (Morena Baccarin), is introduced in the premiere of Season 10 ("Flesh and Blood (Part 2)"). SG-1 searches for the Sangraal, an Ancient weapon that might defeat the Ori, while Ba'al and his clones attempt to find