Uncle Iroh then jumps in and stalls Azula so that Katara can escape with the unconscious Aang. But Azula strikes him down with a bolt of lightning. The Dai Li show up to help Azula, so Aang decides he needs to enter the powerful Avatar state in order to win. To quickly recap the scene, Azula and Zuko attack Aang and Katara in the crystal caves of the Earth Kingdom. It's a brilliant scene that uses screenwriting rules and tricks to create a perfect five-minute sequence of storytelling. That's just one of the reasons why this fight isn't your typical anime battle. This scene is filled with multiple examples of characters using their abilities in new ways. Narrator: In this fight scene from "The Crossroads of Destiny," the final episode of season two of "Avatar: The Last Airbender," we see Aang create crystal armor for the first time.