Aang grows upset and angry and confronts the Sandbenders, learning that Appa has been sold.
After stopping a Fire Nation drill threatening the safety of Ba Sing Se, they look for Appa only to find themselves dealing with the Dai Li before exposing their leader's deception.
But upon learning that he was actually on the back of a Lion Turtle, one of four that made the first benders by manipulating humans' chi, Aang receives the Lion Turtles' Energybending ability.
With this ability, as he regained his Avatar State, Aang removes Ozai's bending ability, rendering him harmless and ending the Hundred Year War.
Learning that he was to be taken from Gyatso caused Aang to flee the monastery on his flying bison, Appa, before being caught by a storm; the life-or-death conditions triggered the Avatar State, encasing the young Avatar and his bison in an air-pocket among icebergs, where he remained suspended for a century.
Although Monk Gyatso had snuck in the bed late night to tell Aang that he won’t be relocated to the Eastern Air Temple, it had already been too late.
The group reunites with Jet helping them find Appa at Dai Li headquarters.
After helping the Water Tribe drive off a Fire Nation invasion headed by Admiral Zhao, with Katara as his teacher, Aang and his group journey to the Earth Kingdom to find an Earthbending teacher.While he did not feel the effects for many years, after he entered middle age in his 50s, the strain of this exertion increasingly weighed upon his body.Ultimately, it resulted in Aang dying at the relatively young biological age of 66, in 153 AG.In the sequel series' first season, Avatar Aang's spirit occasionally serves as the spiritual advisor to seventeen-year-old Korra (much like the previous Avatar incarnation, Roku, did for Aang).Initially, Aang is only able to give Korra glimpses of his memory concerning Yakone in relation to her confrontations with his two sons, Amon and Tarrlok, the products of Yakone's Bloodbending vendetta on the Avatar.He is an incarnation of the "Avatar", the spirit of light and peace manifested in human form.As the Avatar, Aang controls all four elements (water, earth, fire, and air) and is tasked with keeping the Four Nations at peace.Later, in the Fire Nation capital, Aang is seen beside Zuko, the new Fire Lord.The series ends with Aang and his friends relaxing at Iroh's tea shop at Ba Sing Se, where Aang and Katara share a kiss.When Aang died, the Avatar spirit reincarnated into Korra of the Southern Water Tribe.Aang intended for the Order to simply guide and guard Korra, but several mishaps in the aftermath of Aang's death (including a kidnapping attempt by the anarchist Zaheer) and the still-fragile state of relations between the now-Five Nations resulted in Katara and Tenzin sequestering Korra in a compound at the South Pole, bringing teachers to her instead of allowing her to seek out her own.