Disclaimer: I do not own Avatar the Last Airbender or any of the characters.
Katara's POV
The lightning. The horrible, horrible lightning. Azula's weapon. It struck him, and he fell. I carried him to safety, onto Appa's back. We flew away from Ba Sing Sa. The going was slow with the earth king, Bosco, and the gangs weight on Appa. When we were a safe distance away I turned to the boy in my arms. His light was gone. And light was the answer. The water from the spirit oasis glowed as I removed it from its imprisoning container. I pressed the water into his back, hoping, praying to the spirits that somehow a miracle might happen. I leaned him back onto Appa and waited for something, anything. And then a flicker of movement. My eyes reflected him staring back at me. Aang, my best friend. I thought he was gone. But he was gone, and I brought him back. I held him close for a moment and when his breathing became regular again I laid him back down. His eyes were closed and peaceful as he slept. Appa's reins slid into my hands. And we were off. To find a place to heal.
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Appa landed in a clearing, next to a fast flowing river that eventually lead to the roaring ocean. Toph was the first to jump off Appa. Almost before he landed. She made a huge earth tent, with a bed, and a table like piece of rock. Then ran back to Appa and plucked the loose hair off of him. She laid this on the bed. She had just finished when Katara came in with the young air bender in her arms. Aang was laid out on the bed. He looked like a corpse, pale and still. Katara kneeled next to him and pulled more water out of her water skins, which seemed to be getting heavier and heavier as the days went on. Her eyes drooped as she slid over to Aang and placed the glowing water onto his back.
"Sokka, I need more water!" she yelled.
Footsteps could be heard heading over to the river. A few minutes later, Sokka returned with three bowls of water. Katara discarded her old, now bloodied water, and bent some new water around Aang's wound. The earth king peaked in to see how the Avatar had faired the trip. What he saw was not promising. Aang's wounds were almost healed, but he refused to wake up.
"We don't want to be any more trouble," said the earth king with a gesture to himself and Bosco. "Is there nothing we can do?" Sokka placed his hand on the earth kings shoulder, shaking his head and said, "Its all up to Aang now."