After Sora left the beach, the first thing that he noticed about this world was how easy it was to see. Every direction he looked eventually led to pitch black, yet he was still able to see perfectly fine. So why then was he able to see? It went against everything he'd learned, but he figured with time he'd adjust.

The paths in the Realm of Darkness were very twisted and chaotic, with no pattern or structure. It seemed that the paths also defied physics, as the paths were all narrow and hung suspended, like someone had frozen them in midair, never allowing them to fall. Also, it might've just been his imagination, but whenever he fought he felt more fatigued than he should've been, like he'd fought two or three times more heartless than he actually had.

Conveniently, this lead to the third thing that the keyblade wielder noticed. As bad as the heartless were in the Realm of Light, they were even worse here. They were everywhere, which made sense seeing as this was their home turf. Even was was that they fought more ferociously here more than they ever did in his realm. Even Shadows weren't a threat to be taken lightly, and they were the weakest kind! If it wasn't for his spells and enormous stock of healing items, he was sure he'd be a goner by now.

Actually, that's another thing. Where did all of these chests come from? He'd been finding these chests everywhere with all kinds items such as healing items and some scriptures on how to do moves he'd never thought of. He'd have to look into that later.

After he'd walked for a while, defeating heartless along the way, he found himself in a huge, circular area with a couple of paths branching off to the left and right. He felt a few presences to his right, prompting the teenage to summon the Kingdom Key. He moved into his crouching position he typically used in battles, and got ready to fight. There were a couple Neo Shadows and an Invisible. The last time he'd seen the sword-wielding heartless was in the world where he had confronted Xehanort's heartless, Ansem. These were probably much stronger than the others as well.

He got ready to dash at the heartless when a chill went down his spine. It wasn't just these three nearby. He looked around, and was realized that he was surrounded by heartless. And none of them were weaker heartless. There were even a couple of orange Invisibles, which were probably more powerful than the ones he had seen previously. The sight caused him to falter for just a second. A second was all they needed.

A Neo Shadow jumped from the black, yellow-spotted ring and clawed at Sora's back. Caught off guard, the keyblade wielder gasped in pain before recuperating and slashing back at the Neoshadow. He slashed again at the enemy in front of him, destroying it in a puff of smoke. The only convenient part about this fight was that it was unusual for heartless to fight one person up to three or four at a time in large groups. If he had to guess, it was probably so that they wouldn't get in the way of each other while fighting.

Three more heartless advanced, prompting Sora to lunge at the one in the middle before spinning with his keyblade outstretched, knocking them on their feet. He created a small explosion on the ground, lifting the heartless and himself into the air, where he hacked and slashed at the enemies, causing them to dissipate as the Neoshadow from earlier had. As tough as the heartless in this realm were, it seems that they weren't any better at dodging.

It was during battles like these that his mind just kinda went on auto-pilot, and when the battle was over, he usually couldn't remember anything of the battle he'd just fought. One of the biggest examples he could think of was his battle with the one thousand heartless in Radiant Garden. The big difference here being that there seemed to be even more heartless than that.

The fighting continued like this for a long time, with Sora using his whole slew of moves in his wide range of attacks, and using his magic to take care of enemies who put him in awkward fighting positions and to heal when he couldn't get his potions out in time. Fatigue was beginning to set in on the young teenager, which was starting to become apparent in his movements. It was probably the accelerated weariness that this realm was exerting. He could have sworn he heard heartless being slain somewhere in the distance, but he had no time to think about it. He was running out of energy, and fast.

Calling upon his last reserves of strength, he used the series that he had developed in the underworld in Hercules' world. He wouldn't be able to perform trinity, which typically followed these slashes, as he was by himself, but the slashes by themselves were very devastating. His attacks did put a sizable dent in their numbers, but for every one he destroyed, there was another who eagerly took its place. As Sora finished his long series of lunges and strikes, he saw what little effect his attacks were having. He would have to perform trinity by himself.

The teenager held his keyblade up, pouring all of his remaining energy into a sphere of light in front of him. It was feeble in comparison to the other times he's performed it. His heart sank. It looked like it was the end for him. He had one job for himself, and he blew it. He was about to release the energy when he felt someone or something run up and begin to pour energy into the sphere of pure light. It swelled, becoming huge, and almost blinding, causing him to be unable to see who was helping him.

The heartless were closing in. With no time left, the duo overflowed trinity, forcing the mass of light to explode, wiping out all the heartless in the area. The adrenaline that had been helping Sora stay awake up to this point finally failed him, causing him to fall onto his back. His vision became incredibly blurry. He saw a figure who appeared to be garbed mostly in blue kneel beside him, and then all went black.