Katara watched with pride as Aang rose from his hastily made crystal shield in a column of light and air, his eyes and tattoos glowing a fierce white. 'He did it. He actually did it,' she thought while fending off the Dai Li Agents around her octopus form. She spun while slicing her hand through the air, causing the tentacles to lash out, keeping her opponents spaced away from her.
A loud screeching noise cut through the room, winning out her concentration, causing her bended water to drop with a splash. The Dai Li wasted no time moving in on her, forcing her to make a new octopus with fewer tentacles than the original. She mentally cursed as she sliced a pair of fist-shaped rocks when she heard the screeching sound again, this time accompanied with a hauntingly familiar scream. She watched in horror as her best friend violently convulsed in the air from which he was suspended, like a puppet dangling from strings. She traced the stream of blinding lightning to the Fire Nation Princess's now-smoking fingertips.
As he began to fall, he lost his glow. Katara summoned a tidal wave from the surrounding of water and rode it to the falling Avatar, washing her opponents away with her. As she held the boy in her arms, she looked up. A small army of Dai Li Agents faced her, all flanking the princess and her treacherous snake of a brother. "To think I trusted him, even for a second" she thought angrily. Looking again at what faced her, she knew all was lost. Even with all the water surrounding them, there were just too many.
As they made to approach her, a ball of fire explode in front of them as a man she recognized as the prince's uncle jumped from an opening above them. "You've got to get out of here! I'll hold them off as long as I can!" he said before sending forth a rapid string of fire balls. Katara carried Aang to a small waterfall, and bended three loops of water around them, which stretched upwards to send them up the underground catacombs. The last she saw was their savior encased in a cage of crystals.
As she rode on Appa's back, reunited with her friends and the Earth King and his bear, she put down the defeated Avatar. Crying, she lifted a small vial filled with spirit water. As everyone watched in silence, she bended the contents out of the crystal vial, and circled the water above her palm, causing it to glow a soft white. She applied the water to the horrid mark marking where the lighting burned into the boy. The wound glowed, but disappeared as soon as it appeared. Katara's eyes widened in shock. No sound, no stirring came from the Avatar. He was gone. She cried uncontrollably, showering the dead boy in tears.
The King looked at his former kingdom, which shrunk with every second. "The Earth Kingdom was fallen," he said aghast. Katara, her head burrowed in the Avatar's chest, look up at her friends, saying, in a horse voice, "The world has fallen."