The Legend of Korra Season 2 Book Two: Spirits Episode 8-Beginnings, Part 2 Episode Title:Beginnings, Part 2.Episode Description:Wan discovers a second lion turtle city inhabited by airbenders, but no sooner has he arrived than Vaatu appears, turning other spirits dark and threatening to destroy the world. Determined to stop Vaatu, Wan resolves to master additional elements with Raava's help, and prepare for the 'Harmonic Convergence', during which Vaatu and an increasingly weakened Raava will battle for the fate of the world. Wan and Raava fail to stop a bloody war initiated between the humans and spirits by Vaatu. Arriving at the Southern spirit portal, Wan and Raava enter the spirit world and join battle against Vaatu by having Raava temporarily inhabit Wan. The battle goes poorly, but when Harmonic Convergence begins, Wan and Raava are able to fuse together permanently, thereby becoming the first Avatar. After sealing Vaatu in the Tree of Time, Wan convinces the spirits to return to the spirit world and seals the portals, becoming the "bridge" between the two worlds himself. Years later, a dying Wan lays on a smoldering battlefield and apologizes to Raava for not bringing peace to the world. But Raava assures him that their journey has only just begun; they will have many lives together in the avatar cycle of reincarnation. Korra awakens, memories restored, and leaves the island intent on stopping Unalaq's plans, whatever they may be, for the next Harmonic Convergence, which is mere weeks away.