Avatar Roku successfully terrified Firelord Sozin into abandoning his plans for war. Avatar Aang maintained peace for decades, ushering in a golden age for the Four Nations. But tensions boil beneath the surface. The cycle of the Avatar turns once more, and the new Fire Lord Ozai senses a chance to seize his grandfather’s destiny… An Avatar Yue story.

Azula and Aang have a drunken encounter where feelings are shared and life-changing decisions are made. How will they cope with the changes to their relationship and with those they hold close to their hearts. Warning: Teen sex, teen pregnancy, underage drinking, mental illness/disorders, drugs, violence, and some swearing.

[Dragon Empress: The Legend of Azula. Book 6: Rise of the Dragon Empress] This is the legend of Azula. Two years after the conclusion of Book 5, Azula emerges in Republic City for the first time in 40 years. For what purpose? What are her intentions? Will she leave something behind? Or has she accepted that she will always be a villain to the world? [Final Book in DE:TLOA series]

A Spirit angry at the Avatar which they view as a single person(not the thousands of people they have been over time) for breaking a pact that was made in time long since forgotten. In their anger they go after both the entire city of Gaoling and Toph Bei Fong

...to build something greater on the ashes. Vengeful in death, a reincarnated man moves to consume the world of Avatar in a firestorm of his great ambitions, even if he has to drag the world's inhabitants into its golden age kicking, screaming and burning. (Gamer SI-OC)

In his journey to hunt the Avatar Zuko discovered a relic from the past that really should have stayed buried.

Azula searches for love and comfort in her brother, but her tendency for emotional abuse towards him leaves Zuko cautious and confused.

In a world where the Avatar wasn't found, the Fire Nation took over two nations and they strive to overcome the last one. Water Tribe warrior Sokka seeks to fight for his people's rights, but he's captured by his enemies. His life is no longer in his hands as he fights as a Gladiator, and his fate will eventually depend on the Fire Nation Princess, who needs him for her own ends...

After overhearing Iroh talking to Pakku after the siege of the north about him and the white lotus' secrets Zuko remembers his mother's words to always remember who he was realizing he lost himself in his quest to appease his father He decides to set off on his own to find himself without Iroh trying to influence him to his ways.

After dancing with Aang in the cave with the rest of the school students, Katara desires to have a private session with Aang and quickly gets it.

Sequel to 'The Prince's Choice'/'The Warrior's Gambit' & Last in the Trilogy. Some people want to watch the world burn. Some people will do anything they can to stop them. It's not just a battle of hearts anymore, it's a war for the fate of the whole world. Everyone has to pick a side...which side are you on? Zuko x Katara Selection!AU, Tokka, Tylaang, Azula/Chan

Part 2 of The Failed Search AU. Zuko has finally found Ursa, but things still don't feel right. Meanwhile, Sokka decides that the best way for Azula to heal is to take her away from the Fire Nation, and after a suggestion from Suki, he takes her to Kyoshi Island. Azula gets the healing that she deserves, Sokka slowly falls for Azula, and Zuko has a lot of growing up to do.

Toph eats weird berry becomes a futa can she create empire to rival the fire Nastion? Toph Harem

After the war toph tries to thank

Agua, Fuego, Tierra, Aire... Únete a la aventura y descubre un mundo de posibilidades infinitas junto al intrépido Jirok, protector del Avatar. Viaja con él a vastas tierras desconocidas, explora misteriosos enclaves y descubre antiguos secretos. Con su astucia y habilidades excepcionales, Jirok se enfrentará a lo desconocido y dominará los peligros que encontrará en el camino

On a rainy afternoon, a strange girl visits Pao's Tea House. Iroh sends Zuko to take her order and from there this story takes off. It basically follows the main plot, but inserts two new characters, a girl called Lin and her servant Zhenzu. I think everything else will be revealed as the story progresses. It's a Zuko x OC story, but also about family...

The Demitar, bender of two elements, is a fundamental part of the Avatar's power. In this reimagining of Avatar: The Last Airbender, Raya is the next Demitar. Born into the Fire Nation only a few years before the demise of Avatar Roku, she is thrust into a world on the precipice of war. Frozen in time for one hundred years, she must find the new Avatar, and defeat her own nation.

Team Avatar and others read Legacy of the Fire Nation.

Team Avatar and others read The Rise of Kyoshi.

Sequel to the canon-divergent and early-Zuko-join fic Catalyst, Catastrophe starts at the beginning of book 3 and follows the Gaang through to Day of Black Sun. Zuko continues to wrestle with his feelings toward the Fire Nation, his family, his friends, Katara, and the war as the time for the invasion arrives, and what it means to finally be "good."

Set after the events of The Beach but before the events of the Day of Black Sun. Azula has shameful feelings about her own father. What happens when these feelings become known to Ty Lee? Will Azula finally achieve her twisted desires and if she does will she pull Ty Lee and Mai into serving Ozai as well?

Avatar the Last Airbender, Zuko SI. A Zuko SI quits the Fire Nation and decides to wander the world instead. Disregard political power, acquire spiritualism. Part of the Catalog of Companions Knockoff challenge.

Katara and her mother Kya are taken to the fire nation. And their new lives begin. As does their new training. And after that everything changes. Some for the better. Some for...Well you'll see. Lewd. Smut.

AU set in the canon timeline. Aang, after learning that he will be sent to the Eastern Air Temple and away from Gyatso, makes a decision that changes the course of his destiny and rewrites his story, and the story of the characters of ATLA. As the Water Tribes attempt to conquer the world, Aang must master the four elements and bring balance to the nations before it's too late.

Sokka and Toph are stranded on board an abandoned station with a small group of survivors. All around them, the dead are rising from the darkness. Filled with insatiable hunger for living flesh. And in the depths of the station lurks something even more terrible. Something from Sokka's past that he must face, if any of them are to survive. (Angst and Tokka in later chapters)