Sozin’s Comet, Part 4: Avatar Aang
Ozai accidentally causes Aang to enter the mighty Avatar State. The Order of the White Lotus successfully liberates Ba Sing Se, while Sokka, Suki and Toph disable all of the Airships. Katara freezes and chains Azula down, triggering a psychotic breakdown in Azula, then uses her exceptionally strong healing abilities to revive a severely wounded Zuko. Aang easily overwhelms Ozai, yet still refuses to kill him. Aang uses his knowledge from the lion-turtle-a newly acquired bending ability called energybending-to permanently strip Ozai of his firebending abilities, defeating the Phoenix King without taking his life. Newly appointed Fire Lord Zuko declares the war over, and Aang and his friends celebrate together at Iroh’s tea shop in Ba Sing Se. Zuko and Mai reconcile officially, and Zuko confronts his father, angrily asking where his mother, Ursa, is being kept. Aang and Katara share a loving hug and kiss passionately before the sunset.
Note: The series is directly followed by The Promise, The Search, The Rift, Smoke and Shadow and North and South comic trilogies. This series is followed by The Legend of Korra.