A/N: I do not own Avatar: The Last Airbender. This is my first fan-fic, so it might not be too good. Constructive criticism is welcome!
Katara watched in horror as Zuko leaped straight into the path of the lightning bolt. They both knew that redirection of lightning required deep concentration and a steady stance, or it could prove fatal. Zuko was anything but calm and concentrated right now, but that didn't matter. He could not let himself be the cause of a friend's death, no matter what the cost.
"Azula is being overpowered by Zuko, and she knows it too," thought Katara. "I wonder why she hasn't tried using any lightning yet. She may be too insane think of it right now, or she could be planning a surprise attack." Azula and Zuko have been fighting an Agni Kai over the throne for the past ten minutes, and it seems as if Azula is being overwhelmed and overpowered by Zuko. Whenever Azula believes she has the upper hand, Zuko counterattacks and steals it back. "What am I supposed to do?! I don't have anything left, and Zuzu is beginning to win! I cannot be defeated like this, especially by the likes of brother!" thought Azula angrily. Azula was deep in thought when suddenly, she was swept off her feet onto the ground by a fire blast to the feet.
"No lightning today? What's the matter, afraid I'll re-direct it?" bragged a rather cocky Zuko. He didn't know it at the moment, but those words would be the largest regret, and last regret, of his life. "You want to see lightning?! I'll show you lightning!" Azula angrily replied. "I'll make him eat those words," thought Azula with a smirk on her face. Zuko didn't suspect a thing. He was ready in his stance, just like his Uncle Iroh taught him. He thought he was prepared, but he was wrong. Azula charged her lightning, and shot it directly in Katara's direction! Katara watched in horror as Zuko leaped straight into the path of the lightning bolt. They both knew that redirection of lightning required deep concentration and a steady stance, or it could prove fatal. Zuko was anything but calm and concentrated right now, but that didn't matter. He could not let himself be the cause of a friend's death, no matter what the cost. He could not just stand there. Just as the lightning bolt made contact with Zuko's chest, more specifically the heart, that was when his world went black. Katara rushed over to him as fast as possible, tears streaming down her eyes. "Zuko!" she screamed in terror as she ran to find Appa with the banished prince in her arms. Once she found Appa, she lifted Zuko up onto the saddle, and with a quick "Yip-yip!" they were soaring away. Katara put her ear to Zuko's chest, trying to listen for any sign of a heartbeat or Zuko breathing. When she was unsuccessful in finding both of those things, the young waterbender found herself screaming in anger and denial. "No, no, no! Why didn't he just stand there and let me take one for the team! He could've became Fire Lord and declared the war over! My life wouldn't have been important anymore after the war anyways!" She was practically bawling at this moment. After every try at bringing him back, or searching for other signs of life was unsuccessful, she gave up. Zuko was gone.
Azula didn't even bother trying to blast them down. She knew that they wouldn't come back, especially with Zuko in the position he was in now. Now all that was left was to be crowned Fire Lord, and earn her rightful place on the throne. "My work is done," she declared out loud, with a smirk on her face.
A/N: So, what do you think? I know this is short, I will try to make the second chapter longer. I don't think there was a way I could expand on this chapter anymore, the whole point of this one was to explain that Zuko lost the Agni Kai to Azula. I will write the next chapter ASAP.