Five hundred years...
It has been five hundred years since that demon took over his body. Kai was trapped in the backest part of his subconscious since then. He had waited and trained for a long time. He wondered what Oogway was doing right now.
Kai thanked himself for not telling Oogway about the truth. That he was a living prison of an ox demon. Oogway banished him to the spirit realm without knowing that the demon was behind all of this. He only knew that his brother turned into a power hungry maniac and he had to stop him. At least it would make him less sad, compared to if he knew the truth.
Kai didn't know what the demon was doing with his body. He hoped it didn't destroy anything. Luckily, they were in the spirit realm. It would take a long time and a lot of effort for the demon to get out of there.
Kai smiled. It was time to end this. He used the five hundred years to master Chi. He needed that if he want to have a chance against the demon. He deemed that his training was enough. It was time to put it into action.
Kai wanted to test his Chi control. He entered the stance to manipulate Chi. He started to move, first his hands, then legs, then his entire body was moving. His hands and legs glowed yellow. Kai closed his eyes as he danced on the green valley his subconscious made as his place.
His mind was empty, and he was able to focus on the flow of his movement. Inner peace.
Kai sent the Chi in a wave that sweeped the valley. Wherever the yellow energy moved, there would be blooming flowers and growing trees. Kai didn't expect to create an animal just by that Chi wave.
He was ready, he thought. This was beyond his expectations. H grinned as he shouted to the sky.
"Niu Yao! It's time you give my body back to me!"
A laugh rang across the valley. It was so deep. The laugh of a demon.
"You think you would be able to take my freedom? You're dreaming!" The demon's voice answered.
Kai gritted his teeth. He had enough of that damned ox. Kai grinned as he pictured the ox trying to get out from his cage.
"Oh really? I think you'll take back your words after I put you back in your cage!"
Kai shot into the sky like a shooting star. His body was glowing yellow, Chi engulfing his entire form. He opened his palm and willed the Chi to be focused on it. A yellow ball of Chi appeared in his palm, ready to smash his subconscious world.
The ball touched the sky, and it exploded in yellow and green waves. Kai had opened the gate between his subconscious and his real mind, where the giant ox demon was controlling his body.
The demon was huge. Kai was just an ant compared to it's size. It turned it's head to Kai and showed it's furious expression.
"You dare to challenge me?"
"Why not?" Kai replied as he shot towards the demon. He readied his Chi, preparing for a Chi battle against the demon.
Niu Yao summoned his green Chi and sent it to Kai. Kai entered into his Inner peace state and focused as he shaped his Chi into a huge arrow with him on it's center.
The yellow Chi arrow pierced through the wave of green Chi, and Kai was able to reach the demon. Kai summoned his Chi again and used it to push back the demon from his mind, into his subcobscious.
Kai wasn't finished however. He made a massive Chi cage to trap the demon within his subconscious. He grinned in victory.
"No! This isn't over, mortal! I will repay you!"
Kai ignored it. He walked around the room that was his mind. Kai closed his eyes as he assumed control of his body, the first time since five hundred years.