Since it's rather gotten past the point where a place on the Minor AUs Index is appropriate.
In a world where the line of the Firelord was cursed to give up their daughters in sacrifice to demonkind, things change when the demon Ozai is sent to torment and kill Princess Ursa.
Stories
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Ilah, second-
Ozai and Lu Ten, enjoying life-
Iroh and Ozai, a secretary is not a toy-
Ozai/Ursa, the first impression was... memorable-
Ozai/Ursa, second meeting-
Ozai, duties at the Ministry of Lust-
Lu Ten and Ursa, what they expected was not exactly what they got-
How Haru happened-
Ozai/Ursa and Lu Ten, shocking discovery-
Lu Ten and young Zuko, breakable-
Family dinner with the demon side of the family-
Zuko, trying to make friends-
Ty Lee meets Azula-
Iroh and Ozai, when demonic politics and demonic family issues interfere with each other-
How Zuko got the scar this go around-
Lu Ten and Ozai, scars-
Zhao, humans can stop demons-
Zuko, all that you are-
Azula, to be the apple of his eye-
Haru, balance-
Jee and Zuko, meeting-
Zuko/Jee, limits-
Zuko and Aang's first meeting-
Jeong Jeong - what is he?-
Katara and Haru, inspiration-
What is Jet like in this?-
Yue and Zuko, opposites-
Zuko, hiding his heritage-
Zuko and Jee, respect is earned, not given-
Jet on the ferry