Hehehe… sorry about that REALLY long delay of updating. SORRY! I'll try to make this one as long as possible…without writer's block of course. But it's been a while since I last updated. So..uh yeah. Lol. Sorry if it's crappy!

Disclaimer: I do NOT own Yu Yu Hakusho

Diguri's Castle

Diguri laughed. "Those foolish mortals…they will never know my secret until it is too late."

The demon walked up behind him. "Master, should I go now and fetch the girl?"

"Yes, and do not get distracted by petty little things such as Hiei. We need the Chosen one as soon as possible! We will deal with the spirit detectives later."

The demon chuckled malevolently and faded into the darkness.

With Serenity and Genkai

Serenity sighed, and attempted to focus. Her mind was changing from a white pureness to dark red swirls. A dark purple-red aura surrounded her.

Genkai smiled. "Nice job, Serenity."

Serenity squeezed her eyes shut even more, and she held out her hand with the seed embedded in it. Almost immediately, a swirling mass of purple-red darkness formed.

Genkai widened her eyes. What a quick learner…

"Okay, Serenity. You can stop now. We will focus on another structure."

But it was too late. The seed that was implanted into Serenity's hand was already taking control, and giving Serenity more energy and power. Serenity's hair blew in the windless air, and she slowly opened her eyes. Her red-streaked, dark brown eyes were turning pure blood red and her hair started to have purple highlights along with the red in her brown hair. The swirling mass of purple-red darkness grew darker and enlarged quickly. Serenity's seed-embedded hand glowed with the mass and it glowed brighter with every heartbeat her heart made. Serenity couldn't take control of her powers, and Genkai noticed it right away.

"SERENITY! BREATHE SLOWLY! TAKE CONTROL OF YOUR POWERS!" Genkai had yelled.

Serenity laughed evilly and stood up, towering over the sitting Genkai. Serenity grinned maliciously.

"No, no more of this."

Serenity's voice had changed. No longer was it the sweet, light voice it was before. It had two tones to it. One was deep, and clearly very evil, while the other was a more helpless version of her voice. Serenity prepared to throw her swirling mass of darkness at Genkai.

Genkai's heartbeat faster. What do I do without hurting Serenity! I guess I have to.

"Don't make me hurt you, Serenity! I still know you are in there!"

Serenity laughed. "Yes she is in there…because she is me!"

And with those words, she threw the dark ball at Genkai.

With Hiei, Kurama and Koenma

Hiei and Kurama started to walk toward the portal when the screen in Koenma's office lit up.

"Koenma, sir. Your screen has lit up," said Goki.

Koenma rolled his eyes. "I think I know that!"

Koenma turned around and saw the screen, and gasped.

"Hiei…Kurama…I think you should see this first before you go…"

Hiei and Kurama turned around and saw the screen. It showed Serenity transforming into some kind of demon form, and attacking Genkai with swirling masses of darkness. Genkai was evading them, but they seemed to be homed in on her. They would eventually hit. So far, Serenity had throw 5 balls of darkness at her. Serenity laughed, watching Genkai flee for her life. Hiei's eyes widened and Kurama was speechless.

"I want you two, to save Genkai…and help Serenity control her powers NOW!"

Koenma created a portal, and pushed the startled two into it.

With Serenity and Genkai

Serenity laughed. "You'll never survive this, grandma. You know…they'll eventually hit and you'll be gone forever."

"We'll see about that."

"Oh no…you won't be going to the spirit world when you die… you'll be forever trapped in this."

Serenity showed her the seed embedded on her palm.

"This wonder captures defeated victim's souls and transfers their power and energy to me. Even IF the victim's power and energy has been depleted, you'll still be in here…forever trapped."

"Well…like I said before. We'll see about that!"

Genkai ran toward Serenity and made a sharp left. The dark masses weren't fooled though, and somehow saw it coming.

"What the…" gasped Genkai.

Serenity laughed once more. "You see…my attacks and I have a certain…hmm…connection…with one another. I can stop them from hitting you, tell them where to go next, etc. That's why they didn't hit me." Serenity laughed again. "We're too smart for you! HAHAHAAH! One hit from the mass of destruction can kill a normal human being. Let's see how many can kill the Great Genkai!"

Serenity grinned and formed 4 more of the deadly masses. But before she could release them, Hiei had his katana to her throat.

"Tell those things to stop chasing Genkai or I'll slit your throat, baka onna," Hiei whispered into her ear.

Serenity laughed. "You think I would stop the fun?"

"NO! HIEI DON'T!" yelled Kurama.

Serenity stopped the masses from chasing Genkai…but they started to attack Hiei and Kurama.

Serenity giggled with amusement as poor Genkai fell to the ground, exhausted. Hiei widened his eyes and let go of Serenity. Serenity released the four other masses and made them attack Hiei and Kurama.

Genkai quickly gathered the rest of her energy, aimed and shouted, "SPIRIT GUN!"

Serenity tilted her head to the left, slowly just a little bit without even looking back. The spirit gun had missed. Genkai was speechless.

"H-How could anyone dodge that without even looking!"

Serenity turned around and looked at Genkai. "Didn't I already tell you about my connections? Hahaha. It seems as if the old grandma wants some of the fun, too!"

Serenity formed 3 of the masses and threw them at Genkai, and this time, Genkai did not evade them.

"They'll have to go away soon enough!" she shouted.

Serenity laughed with amusement. "AHHAHA. They won't go away until their prey is destroyed. Eliminated. Annihilated. Dead."

Genkai quietly cursed at herself and forced her legs to get her up. She ran once more. Hiei was swiftly evading the dark masses and attempted to get closer to Serenity so he could make her stop the chaos. Kurama was having a little difficulty though. His running was not as fast as Hiei, and his dark masses kept trapping him in a corner.

"Rose whip!" Kurama yelled.

He attempted to his the masses, but it went right through them. He cursed quietly and attempted to run to the other side. Kurama succeeded, but got hurt in the process. The dark masses beat him while he was getting through.

With Yusuke and Kuwabara

"WHAT IS WITH ALL THE NOISE OUTSIDE!" yelled Kuwabara.

Yusuke looked out the window.

"OH MY GOD! KUWABARA! IS THAT SERENITY!"

Yusuke and Kuwabara ran down the stairs and went outside.

With Hiei, Serenity, Kurama, and Genkai

"You bakas! Help us!" he snarled to Yusuke and Kuwabara

Yusuke prepared his spirit gun and shouted, "SPIRIT GUN!" and fired at a nearby mass. It went right threw it though. Suddenly, Serenity froze and went limp. She fell forward slowly, but a gruesome dark hand caught her.

"It was so nice of you to distract her while I was preparing." The demon laughed and vanished into thin air with Serenity. (A/N: This demon has invisibility and regeneration powers so that's why Serenity didn't know he was coming.)