Kingdom Hearts and their characters are owned by Squaresoft/Disney. In other words, I own nothing in this story other than any original characters, which I doubt since there are none. Thus ends my disclaimer.
His silver hair flowing down the back of his cloak of black, Xenmas looked upon the strange heart-shaped moon that hovered near the altar, or at least what was left of it. It was because of HIM, the one who had shamed his research on the heart, that all of his efforts to turn this moon into Kingdom Hearts went into vain. It was ironic, actually, having taunted Sora's effort when it came to fighting the Heartless that released the hearts to create Kingdom Hearts. As he calculated the course of action that would restore Kingdom Hearts quickly, Xenmas could hear footsteps from below.
Xenmas glanced over the six intruders, the ones who had interfered with his plans long enough. The duck called Donald and that Goofy creature were the only two he did not have to worry about, but it seemed that their time with the Keybearer not only made them stronger but made the Keybearer stronger as well. Next was that Mickey Mouse, a king who wields one of the Keyblades. Xenmas had thought that even if the King was snooping around for hints about his plan while posing as an Organization member, there might have been nothing the King could do. Kairi, a Princess of Heart as well as of Hollow Bastion, was originally to be used as a mean to control Sora, but he did not plan on her to escape. In fact, Kairi was the basis of a certain Nobody as well as a potential Keybearer, making her a possible threat. Riku, who had been a medium for Xenmas's other side, was originally suppose to be the original Keybearer if he had not given into the darkness. Perhaps when Riku was caught in the explosion of that inferno machine that had somehow gotten rid of the darkness within him. Riku also worked with both Mickey and Xenmas's main obstacle and was responsible for leading Sora here and kidnapping Roxas.
Roxas, no, Sora was the biggest threat to him, to his plans. Although he would have thanked Sora for disposing of some rebellious members as well as giving birth to Kingdom Hearts, Xenmas knew he had the potential to best him. After all, Sora had eliminated all but three of Organization XIII; that traitor Axel had opened the way to this world and Roxas, through and against his will, became one with Sora. Xenmas knew from previous experience that Sora was skilled, and it seemed that even with Sora's visit to Castle Oblivion and absence, he had become stronger. Xenmas could not feel the chains called fear or the pyre named revenge, but he did know that if Sora were to finish him of, then no Nobodies would ever be complete. Once the first person came to the top of the stairs, Xenmas mended his dark portal to bring the visitor and him to a secluded section of the city down below, planning to reduce their numbers one by one. The one who reached the top of the stairs first was Sora.
Despite the curse that Xenmas placed on Sora, which drained away his heart slowly, Sora continued to fight on, even making Xenmas believe he was surprised. Two years ago, Sora fought him with his friends and Sora had trouble to keep track of Xenmas. Now it seems as though Sora had the upper hand in the battle, and Xenmas was losing. Did his heart become stronger, or did this extra power come from Roxas, Sora's other half? The battle eventually came to the point when Xenmas could not battle without losing power over the battle ground, and soon enough, both he and Sora were back at the altar. Sora's friends, who had prayed for his safety, ran over to him, seeing if he was okay. If there was one thing Xenmas envied about feelings that he could not have, it was the compassion that flowed inbetween them. He looked up to Kingdom Hearts, which had not recovered much hearts since its injury, and a plan flowed into his mind. If the heart had the power to even restore a heart to a Heartless, it should serve his purpose well.
"Kingdom Hearts," Xenmas said as he ascented to the hollowed moon, "I cannot be complete without you, and you cannot be complete without me."
"What are you doing?" Mickey was surprised just like the others. Is Xenmas going this far to unleash the powers of Kingdom Hearts?
Xenmas paid no attention to the stricken faces of the Keybearers, now floating in the middle of the heart. "Lend me your power, Kingdom Hearts, and I shall give you as many hearts as you need."
"Stop it!" sqwacked Donald.
"Fill me with your anger..."
"Don't do it!" Kairi cried.
"Fill me with your rage..."
"That's enough!" shouted Riku.
"Kingdom Hearts, we shall exist, and they will know our true strength!"
Xenmas heard a chain rattling, and looking down, he saw that Sora was pointing his Keyblade at him, at Kingdom Hearts. Riku stepped forward as well, summoning his keyblade, and Kairi raised the one she got from Riku. At a point when the villian would leave his guard down due to such a ridiculous display of persistance, Xenmas continued to maintain the growing power of Kingdom Hearts. They could not stop him from reaching his ultimate goal. However, the tips of the three Keyblades glowing, still focusing on Xenmas. Mickey had a worried look on his face, but knowing the three who were standing against Xenmas, he let their hearts guide them. The three Keyblades suddenly a bright light at Xenmas just as Kingdom Hearts had reach its peak of its remaining power. Sora, Riku, and Kairi were hoping to lock away Kingdom Hearts's power or at least seal Xenmas from the power itself. However, the light from the combination of the Keyblades and Kingdom Hearts soon overwhelmed them all.
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He had expected to fall on solid ground, only to land on something grainy. He had expected to be looking up at the eternal night that loomed the city, but he saw leaves of a tropical tree. He had expected, though he did not wish so, the laughter of Xenmas as they failed to stop him. However, he heard the cawing of seagulls and the gentle rushing of water, something he had not heard for two years. Sora got up and look around, eventually going back to just lying on the ground. That was, until a familiar face loomed over him.
"Hi, Sora." The redhead smiled. "Deja vu."
Sora quickly sat up, embarassed about sleeping on the job, but he remembered that they weren't building a raft this time, so his face stayed red a little longer. "Uh, heh heh. Nice weather, huh?" Kairi giggled.
"It's hard to predict. One day, it's a peaceful sunny sky, and the next day is a darkening thunderstorm." Both of them turned to the silver-haired boy, who was looking towards the horizon. "It's been a while, hasn't it."
Sora nodded. "Yeah. I can't really believe it. I...we're back."
Kairi ran up to the shore, turning around to face the two boys. There was a smile on her face. "Welcome home."