Alright, I'm back. Enjoy some aftermath and, more importantly, a reason why the horcrux acted differently in my story than in canon. This one took a while to figure out, and multiple revisions. I started with an idea about the dynamic between his power and Harry's, then realized I'd buffed him so over-the-top, it was more cringe than a powerscaling argument on Reddit.

Attacking Azkaban?

"Harry, say that again," Twilight demanded.

"Voldemort's going to Azkaban; he's going to attack it!"

"Sunset, get Dumbledore."

"I'm alright," Dumbledore's voice spoke from behind the table.

The old man weakly pulled himself up over the desk. He then slowly moved over to Harry. His walk was labored, as though the Horcrux took a worse toll on him than the others. He kneeled next to Harry, who was sitting back up.

"You must be certain," said Dumbledore. "You're sure Voldemort's attacking? How?"

"I saw it. He's going to break the Death Eaters out, and he's got a body to do it," Harry said weakly. He looked as scared as Twilight felt.

"Then I must alert the Ministry," said Dumbledore. He hauled himself up and marched up to the fireplace faster than a man his age had any right to. "Sunset, Twilight, take Harry to the hospital wing and keep an eye on him. Do not leave until I send someone for you."

"I'm fine," Harry protested. "Just go tell the Ministry."

Without anything else to say, Dumbledore practically flung himself into the fireplace, vanishing in a flash of green.

Left with just the three of them, Twilight buried her face in Harry's shoulder to reassure herself he was still breathing.

"Twilight, I'm okay, I'm okay," Harry repeated as if trying to reassure himself more than her.

"Stop, just stop talking," Twilight commanded. "You weren't breathing. I don't know if you were going to be okay. I thought you were... I don't know. And—" Twilight stopped talking when Harry pushed them apart, far enough to look her in the eyes.

"I'm here now. I'm okay," he said.

Twilight didn't move from where she sat, just letting the anxiety bleed away.

Harry pulled his legs underneath himself.

"Are you good to walk?" Sunset asked.

"I think I can move myself," Harry protested. Harry grabbed a nearby table to help stand up. He stood up and took a deep breath. "Just dizzy, that's all." Harry rubbed his forehead. "And a headache. I'm fine, really. I don't need to go to the hospital wing."

"I don't know," said Twilight. Harry's eyes looked very dilated. "We don't know what that thing was doing to you."

Twilight looked back at the amulet on the floor. As her panic subsided, her inquisitive side came back. What was that? The amulet was supposed to be harmless. Did Tirek's tampering do this? Sunset walked over and picked it up gently. It seemed to elicit no reaction from her. Sunset pocketed the amulet and picked her book up. She walked back to Twilight and Harry.

"I think I'll hold on to this, for now," she said.

"No argument there," Harry replied. "I still don't get why it did," Harry rubbed his head again, "that."

"I'll explain once we get to the hospital wing."

"Do we have to?"

"Of course," Sunset replied. "Besides," she tapped the back of Harry's head and came away with a little bit of blood, "you hit your head pretty bad."

"Fine." Begrudgingly, Harry agreed.

The three of them walked to the hospital wing, though Twilight couldn't stop from hovering over Harry's shoulder. Harry walked, but his steps were shaky and uneven. He definitely felt worse than he looked, and far worse than he said. Upon arrival, Madame Pomfrey healed Harry's head with a wave of a wand. However, Harry's headache didn't go away with it. When Twilight explained Dumbledore's orders, the school matron left them alone after giving Harry a potion to calm his headache. Twilight sat on the edge of the bed, and Sunset on a nearby chair.

"So, can you try to explain what happened?" asked Twilight. "How did you know about Voldemort?"

Harry waited a moment before he said, "When I stabbed the locket, it was like the vision I used to get, from before I got my amulet. I didn't understand it, but I ended up seeing through his body." Harry sat up more. "His new body felt powerful, like I was a living natural disaster. And it was more than just that. I felt his emotions and senses. I- I think, at least."

"Did it hurt?"

"A lot," Harry said. "He's in pain, but he revels in it. It went hand in hand with the power I felt. There's something wrong, down to his soul."

"Maybe your amulet's attracted to Voldemort's soul fragments like a magnet," Twilight guessed. "When you broke the horcrux, his soul fragment tried to latch on. That's what gave you the vision."

Harry shuddered, slumping against the pillow. "You think he can possess me again?"

A chill crept down Twilight's neck. Once was bad enough. If Harry got possesd again... I don't know what I'd do. The best I can do is keep him safe, for now.

"Fat chance of that," Sunset commented. "If he has his own body, true possession is going to be a whole lot harder." She pulled the amulet from her pocket, letting it swing in the air. "Besides, that link you touched was tied to the amulet, not you. This thing was made to protect you. If Voldemort tried possessing you through it, he might just get sucked back into the amulet. It'll be a repeat of that time with Tirek."

Twilight and Harry blinked owlishly at Sunset.

"When'd you figure this out?" Twilight asked. Maybe this has something to do with when her eyes were glowing. I guess I kind of brushed it off to help Harry.

Sunset shrugged like it was as much of a guess to her as it was to Twilight. "When I touched Harry, I got to see the link from... I guess you could call it the third person. I saw the big picture."

Twilight nodded. That makes sense. It is supposed to absorb Voldemort's psuedo-horcrux. Possession could repeat the last attempt, so the amulet still works. It's still scary.

"Still leaves us with two problems," Harry said. "The Horcrux was so powerful, way stronger than the book. It nearly got all four of us."

"I've got an answer for that, too," Sunset added. "The horcruxes are tied to Voldemort's soul. You said something in his soul felt wrong."

"Yeah," Harry agreed. "Somehow, he's gotten stronger. That messed with his soul, which must've empowered his horcruxes. So now he's stronger than ever, and so are his horcruxes. How'd he manage to get a body?"

"Maybe he redid that ritual?" Twilight suggested. "He still has that snake, so he had a way to affect the living world. Maybe he reatempted the ritual over the summer without your blood, not that he needs it without your blood protections."

"Not sure," Harry sighed. He rubbed his eyes, which Twilight noticed looked more tired and stressed than they had in weeks. "That gives us more problems."

Sunset sat down on the chair nearby. "Do you want me to go find Ron and Hermione, Harry?"

"...Don't want to bother them," replied Harry. "I can talk... later." He rubbed at his forehead in a manner Twilight recognized.

"Migraine?"

"Small one," Harry said. "I really hate visions."

"Me too," said Twilight.

"Ditto," agreed Sunset.

"Do either of you have a spell for this?" Harry asked. "I'd rather not deal with the migraine now."

"I'll find one when I can," promised Twilight. "I'm not licensed for that magic in Equestria. Sunset, can you ask Pomfrey? Preferably for the headache or sleep."

Sunset rose from her seat to go find the matron.

"You're going to make me age ten years before we get back," Twilight noted idly.

"Doesn't really matter, you're going to outlive me no matter what," Harry responded.

"And that doesn't bother you?" Twilight asked.

Back in Equestria, the topic of Twilight's lifespan never came up or was intentionally avoided. Everypony knew Celestia and Luna had been alive for thousands of years. Their exact age at their taking of the thrones wasn't known, so it was one of the many mysteries nopony bothered to answer. Twilight never gave it any thought, and Harry didn't seem to care.

"No," answered Harry. "The way I see it, if you live forever it doesn't matter how long I'm mortal. You and the other princesses are immortal. I accepted that a while ago."

Sunset's voice startled them both when she said, "Geeze, I'm gone for two minutes and you two are acting like Harry's on his deathbed." The fiery-haired girl chuckled at her joke. Twilight glared at Sunset, who was hunched over, barely keeping her laughs in check. When Sunset managed to calm down, she stood up with a crooked smile on her face. "I got a sleep potion for your headache," said Sunset, holding up a clear vial.

She offered it to Harry, who popped the stopper off and took a quick sip. Apparently not finding the taste disgusting, Harry gulped the rest of it down. After a long moment, Harry looked at the vial oddly.

"Thanks, Sunset, this headache is killing me—" Harry stopped speaking as he slumped over, asleep.

"Sleep potion," Sunset said. "I can't imagine being awake in his state right now. I only got a brief glimpse in, and that was enough for me. That Voldemort guy's messed up in the head." Sunset shuddered. "I understand Harry's panic. Imagine being in the head of your parent's murderer."

"So what's our next step?" Twilight asked. "If Voldemort succeeds in breaking even a portion of his followers out, he'll have a loyal army armed with dark magic. That puts everyone in danger, us included."

Sunset sat down and opened her book.

"That means I need to finish these spells," Sunset said, flipping through the book to the back. Twilight moved to stand behind Sunset and take a look for herself. "That last spell I mentioned, Merlin mentions a spell called 'Phoenix Embers'; he believed it could be used to 'cleanse' dark magic. I tried using it against the horcrux, it was more effective than anything else I had. I'm still trying to find the rest of the spell, but notes about it are everywhere. Merlin appeared to be obsessed with it. But I'm having trouble finding it. It's incomplete."

"Did he not label the spells?" Twilight asked. Then again, Star Swirl didn't label his last spell either.

"No, he didn't it's like all the pages are out of order and rearrange themselves when I'm not looking." Sunset flipped through the book, skimming the pages. Eventually, her eyes landed on one note. "Here, read this: 'Despite having a wand proficient in protection from dark magic, I find myself no closer to releasing this spell's true ability. My mastery of ancient magics is not what it once was. Until I find the missing pieces, I fear for the future.'

"Point is, Merlin believed it could work," Sunset said. "And I believe it. I only saw a fraction of its potential."

"What did he mean by 'cleanse' magic?" Twilight asked.

"We both know dark magic doesn't follow the rules of other magic, it's why it's so dangerous. Merlin thought this spell could revert the 'corrupted' magic to a more passive state. It could weaken the horcrux's protections for us if I can get it to work."

"How far are you from solving it?" Twilight asked.

"Weeks, months, maybe; I don't know," said Sunset. She closed the book and put it back in her bag. "Normally, I'd rebuild it from the ground up. But the fragments I've found, against all odds, seem to work. Dumbledore seemed interested in a few others."

"Then why don't we split it?" Twilight suggested. "Maybe you can hand off a few extra ones for us to work out?"

Sunset pointed at the sleeping Harry.

"Would he be okay with that?"

Twilight smirked.

"Ever since he got to Equestria, Harry's been looking into combative magic. He got more dedicated when my brother started training him," Twilight said. "And I don't think Hermione would say no."

"Good for them," Sunset said. She stretched and slouched in her seat. "And I'm going to get some rest."

"You're still not sleeping well?" Twilight asked.

"It's this castle," Sunset moped. "I can't get any good rest recently. This human magic is bothering my sleep."

"It's not bothering me. Maybe you should talk to a teacher."

"I'm not giving them my problems, much less my sleep schedule," snarked Sunset before she yawned. "It's gotten better, but not normal."

"You know, if it bothers you so much, you can come and bunk with me," Twilight said.

"You wouldn't mind?" asked Sunset.

"If this really bothers you, why should I? Besides, I could do with some more company."

"Thanks, Twilight," said Sunset. "I think I'll just rest my eyes."

Sunset closed her eyes, and it wasn't long before the girl nodded off to sleep. Twilight was the last person still awake in the room, and she still felt on edge. Hopefully, Dumbledore had been able to alert the Ministry before Voldemort got there first.

Harry's sleep had, thankfully, been dreamless. When he opened his eyes from his potion-induced slumber, he was still in the hospital wing. Judging by the light outside, it was late evening. He looked to his left and grabbed his glasses from the counter.

"Harry's up!" came Ron's voice.

Harry propped himself up to look at the foot of the bed. There was a small table at the edge of the bed with four chairs. Twilight, Sunset, Ron, and Hermione were sitting at the table, looking over books and papers.

"What'd I miss?" asked Harry.

"You still need to write an essay on the dangers of inferi," Hermione said. Harry rolled his eyes, of course, school was the first thing she'd say. "There's not exactly much to say on it; you'll both be done before Wednesday if Ron can get his act together."

"I'm doing fine, I can finish it tomorrow," protested Ron. He slammed his books shut and rolled up his parchments, obviously having given up on studying for the day.

"But, we're supposed to be in our dormitories," Hermione added. "Something's got the teacher's spooked."

"I have an idea about that," Harry responded dryly.

"So, how do you feel, Harry?" Ron asked.

"Better," said Harry. He swung himself out of bed and stretched his muscles. Harry suddenly remembered why he was in the hospital wing in the first place. "What's the news with you-know-who?"

"What news?" asked Hermione. "Sunset and Twilight said to wait until you woke up; said you'd best be awake. They haven't told us a thing."

"Tell them," Twilight said.

"We killed a horcrux," Harry said. Harry saw looks of surprise and perhaps triumph wash over their faces. "But it gave me a vision. Voldemort's attacking Azkaban."

The positive looks faded immediately. Visible shock plastered itself on Ron's face, and Hermione looked very concerned.

The two looked at each other before Ron spoke, "Attacking Azkaban? How's he going to do that, you said he ain't got a body."

"Well I was wrong," replied Harry irritably. "I'll tell you about the rest in a moment. Can I get cleared to leave?"

"McGonagall came in about ten minutes ago and told us to leave the moment Pomfrey cleared you," answered Twilight. "One small problem, however—"

"The school's on a tentative lockdown for now. They're going to tighten the curfew. It's straight back to the common rooms," Sunset said.

"Then I'll tell Ron and Hermione there back in the Gryffindor common room," decided Harry.

"The teachers are doing patrols of the castle," Sunset said. "We're supposed to join in. We'll talk later, I promise."

Everyone stood up and packed up their stuff. The table and chairs vanished, though Harry didn't pay attention to who vanished them.

"See you soon," Twilight said as she and Sunset left the hospital wing. She and Sunset walked away, leaving the three of them to head back to Gryffindor. Harry, Ron, and Hermione walked out of the hospital wing to the Gryffindor common room.

When they arrived they gathered in a quiet corner of the common room so they couldn't be overheard. Harry explained his entire vision, what caused it, and what Twilight, Dumbledore, and Sunset thought it could mean. Harry informed them of everything up to the point where they went to the hospital wing and he drank his potion. Needless to say, all three of them were very much frightened by the prospects ahead of them.

Voldemort had a body and was about to obtain an army. That was, of course, unless Dumbledore altered the Ministry in time.

So, yeah, Voldemort did something. Exactly what is up for everyone else to figure out. But from here on out, you can't count on Horcruxes to do the same thing as in canon. Besides, the locket and ring were the only ones with defenses worth caring about.