"The ultimate dark force?"  Kairi looked at Yuyami with wide eyes. 

"Yes…the source of all heartless, the entity craving to devour every world's heart", Yuyami answered.  "I don't have any details myself, I just know that my job is to help the other keyblade masters destroy it before it destroys us." 

Kairi shivered, not knowing whether it was because of the cold or fright of this new enemy. 

Yuyami had the grace to assume the former.  "This land is always dark, and always cold."  He picked up a backpack that had been hidden in some bushes and began rummaging through it.  "Here, this coat will keep you warm."  He handed her a trenchcoat similar to his. 

Kairi held it for a moment and put it on.  She was about to leave the hood off but Yuyami told her to put it on. 

"Our faces our better left unseen due to the importance of our mission." 

Kairi did what she was told.  "So what now?"  Kairi looked at Yuyami waiting for an answer. 

Yuyami looked up at the sky.  "In this world, when grey moon is up, it's nighttime."  "When the white moon is up, it's daytime." "Even though this world is always bathed in darkness, there is a difference between night and day,"  he added as an afterthought.  "Right now we should probably get some sleep, I'll start a fire." 

He pulled a couple of sleeping bags out of the bag and laid them on the ground. 

"I'll just go get some wood for the fire, I'll be right back."  Kairi nodded and laid down on the sleeping bag. 

"I'll stay awake until Yuyami comes back," Kairi thought, laying back.

Kairi was walking down a dark empty street and heartless were sprouting from every shadow.  However, she continued unhindered and unafraid.  The heartless wouldn't attack her.  How did she know?  She just did.  Even all of the big, badass heartless left her alone.  They just…watched her. 

Suddenly, Yuyami appeared in front of her. 

"You are the source of all heartless," he pointed at her.  Kairi stepped back.

"Who me?"

"You are the source of all evil, of all pain, of all misery."  Yuyami summoned his keyblades.  "You must die." 

Kairi realized that he wasn't talking to her, so she turned around.  There, in the shadows, lurked a dark figure.  Kairi strained her eyes to make out who it was.  He looked so familiar.  The figure raised his and hand all of the heartless attacked her.  She screamed and the only thing she could see was the inky blackness of oblivion.

Kairi woke up screaming only to have water thrown in her face.  "What the hell!?"  She spit out water and dried her face on her coat. 

"Sorry."  Yuyami sounded embarrassed.  "I didn't know how to calm you so I reacted on my first instinct." 

"Where'd you get water!?" 

"From my bag," Yuyami answered. 

Kairi peered into it.  "What is it, bottomless or something?" 

Yuyami smiled.  "Have you ever met a wizard named Merlin in Traverse Town." Kairi thought. 

"Actually I have, why?"  Yuyami picked up the bag.  "I helped him out of a tight spot one day and he enchanted this bag.  It can hold more room than it looks." 

"Interesting…" Kairi said, although her tone suggested otherwise. 

"I'll be back."  Yuyami began to walk off. 

"Where are you going?"  Kairi didn't like the thought of being on her own when the heartless could attack at anytime. 

"I'll be back," he repeated and walked through some bushes. 

Kairi hugged her knees to her chest and thought about her dream.  Who was that figure?  Why did he look so familiar to her? 

Kairi was suddenly jerked out of her thoughts.  "Wha, what was that?"  She thought the ground just shook for a moment. 

She stood up and summoned the Promise Keeper.  Whatever was coming was in for a rude awakening.  She looked at the ground in horror because the ground was turning as black as a raven's wing.  Heartless began sprout from the ground like mutated plants. 

"There must be hundreds," she thought looking at seemed to be an endless see of shadows.  She stood, waiting for an attack, but afraid to launch one herself for fear of their numbers.  The heartless stood, waiting for an attack, but afraid to launch one because of their fear of the keyblade. 

Suddenly, all of the heartless' heads snapped up as if they heard a voice she couldn't.  She thought that this could be her chance to run if she wasn't surrounded.  Without warning, all of the heartless attacked as one.  She found herself being attacked from all sides.  She dished out major damage but it seemed like whenever she destroyed one heartless, three more would take its place.  She was getting weary already and there were still millions of heartless left to kill.  A few jumped at her and she destroyed with with one swipe of her keyblade.  She then jumped in the air and a few jumped with her.  She swiped upward with the Promise Keeper and destroyed five more but more appeared out of the shadows.  She landed back on the ground and performed Strike Raid with all of her might.  The keyblade passed through many heartless foing away and many more on its return.  She grabbed it and began slashing at more heartless. 

She looked over her shoulder and saw Yuyami running toward her.  He jumped and brought his keyblades crashing to the ground with fearsome force.  The ground split open and most of the heartless fell into the chasm. 

The rest of the heartless were just cleanup and when they were done, Kairi swung her keyblade at Yuyami.  He ducked laughing. 

"Where the hell were you!?" she asked. 

He went back to the bushes and brought back the carcass of a small boar.  "Breakfast."