I don't know how many more chapter's there'll be since I'm kind of changing the original story XD

"GUYS!" Raph's panic filled yell filled both parts of the underground home. Immediately, the other three turtles raced to where they had heard his voice coming from to see what was wrong.

"Raph, what's…CASSI!" Mike yelled in horror when he saw her.

Blood pooled onto the floor from the slash across Cassi's throat. Her eyes stared upwards, not focusing on anything. As her body tried to breathe, convulsions tore through her limbs and her fingers clawed at the floor, trying to grab on to it. The gargling noise coming from her slit throat was enough to make all of them want to run. Instead, Don took a deep breath and grabbed the nearest thing he find.

"Mike, go get a first aid kit!" The purple one instructed while holding part of a blanket down on her throat to apply pressure and stop the bleeding. "NOW!" Mike looked sick, and didn't comply. His knees buckled and he quickly passed out. "Raph, go get the kit!" This time, Don's orders were carried out and Raph ran out of the room.

"I didn't think she'd do it," Leo muttered in shock, frozen by the sight before him.

"She did this to herself?" Don asked in reply, holding the blanket steady. All Leo could do was nod in reply. Looking around, Don noticed her katana nearby, and saw the blade was indeed bloody. "Why?"

"I don't know, Donny," he lied, "but she wanted me to kill her. I wouldn't…but I didn't…" Leo trailed off, unable to find any words.

Don didn't say anything in reply, but he looked down at Cassi again. Her movements were growing slower.

"Hang on, Cassi, just hang on!" Don told her, but it appeared his orders were once again ignored. Her movements stopped completely as did her breathing. A muffled sigh escaped her as her eyelids fluttered shut.

"No!" Leo cried, rushing to her side, finally free from the paralysis that had captured him moments before. "Cassi! Cassi!" He fumbled for her hand, and looked at her still form, then up at Don. His brother shook his head sadly, and let go of the blanket.

"She's gone," his voice was barely audible.

"No, no, no…" Leo repeated to himself, each 'no' becoming more grief filled.

"I got it, I got…" Raph stopped as he came back to the others. "Is…she…?"

"Yeah," Don replied, standing up, accidentally hitting the blanket covering her throat. Looking down at Cassi, Leo gasped.

"Guys, look at this!" He exclaimed, moving the blanket off of her throat. Where only moments before there had been a bloody cut was now green skin, no wounds to be seen. By this time, Mikey was coming around.

"What happened?" He moaned, sitting up. "Cassi!" He yelped as he remembered. Getting to his feet, he ran to her other side, opposite of Leo. "No way…" Mike said softly, looking at her neck in fascination.

"I wonder if…" Leo stopped himself, but could tear his eyes away either.

"A regeneration power?" Mike guessed, and he nodded.

"A what?" Both Raph and Don asked, but they received no answer. Leo ran his hand softly across where the wound would have been. Cassi's eyes snapped open, startling the two who were sitting at her side. All four felt relief as her chest rose and sank, indicating that she was breathing once more.

"I…" She started to say something but looked at the four faces around her, as well as the sword that lay not too far away. Reaching to her neck, she felt the solid skin, once more unbroken. "I'm alive?"

"Yeah, and it's a miracle too!" Don told her.

"What were you thinking?" Raph snapped, and she just looked away.

"You four don't need me around. All I've done is cause you to fight with each other and hold grudges against one another. I've lied to you, and I nearly killed you all once. Believe me, you four don't need me. I broke up the team you once were," she whispered.

"No, you joined the team, Cassi," Leo whispered back, tears rolling down his face.

"We want you here with us," Mike added, then shot a look at Don and Raph.

"Right," They spoke together again.

"I guess I'm stuck here anyways," Cassi muttered as she sat up, a look of anger on her face. "I can't even die without something going wrong for me!"

"We don't want you to die," Leo told her, grabbing both of her shoulders. "None of us do!"

Tears formed in Cassi's eyes once more, and she let Leo hold her while she cried. The others, once they had cleaned up the blood, let the two be. Eventually, worn out physically and emotionally, Cassi drifted off to sleep, still in Leo's arms.