Two chapters in one day!

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"So you're saying they switched bodies?" Harry asked in disbelief.

"Harry," Ron whispered, "She's finally gone off the deep end. If we run now, we may just get away."

Hermione slapped his arm for the second time in fifteen minutes. "I'm not crazy; it all makes sense. Acting like the other; referring to themselves in third person; changes in character like Percy getting mad and Fred being calm. Then, Bill's involved somehow because they're spending eighty percent of their time with him. If he knows, than it explains that."

"Still. How?" Ron asked.

"Well, the twins are always experimenting. What if one of their experiments went wrong and literally blew up in their face? If Percy had been there, then, it explains everything. I'm sure there's a book on it here somewhere."

She scanned the shelves in search of it. She knew she had seen it before; she'd seen Fred and Percy reading it on their reading binge a few months ago. What was that all about anyway?

She found it: DNA Chromosome.

"What's that?" Harry asked. "I know I've heard that name before."

"Professor Snape mentioned it once in class," she informed him. "It's defined as 'an ingredient added to a potion to aid in switching bodies. The potion was found to be incredibly dangerous and should never be used under any circumstances.' How did your brothers get it?"

"Fred and George are... talented, to say the least, " Ron responded. "But this doesn't explain how Fred and Percy switched bodies versus Fred and George."

"I think I know," Harry said.

He walked over to stand next to a bookshelf.

"Imagine I'm in Fred and George's room, and they're making the potion, or product, or whatever, right here. Now, imagine there's this loud noise, like their potions usually make. Now, imagine Percy's had enough of the loud noises going off in the middle of the night, so he storms in."

Harry stepped over the stand by their table and mimicked barging into the room.

"Then, something goes wrong. What, I don't know, but maybe Fred and Percy were talking and George noticed that something was off with the potion, so he tells them to duck and he gets down. But what if Fred and Percy were a second too late and the potion splattered all over them, resulting in the switch?"

"Harry might be onto something here," Hermione agreed. "We'll definitely need to do more research, but that's a loose version of what most likely happened that night."

"But there's one more question," Ron spoke up. "Why haven't they told anyone?"

"Maybe," Hermione said, slowly, "they're afraid, too. After all, the Ministry is banned from doing this experiment on people, but I'd be curious to find out. So if it was an accident-"

"They can't be faulted for it," Harry finished.

"Exactly," Hermione agreed. "Because the Ministry would want to do all kinds of testing on them, so they had to keep it on the down low while they figured out a way to reverse it."

"Do you think they've found a way?"

"I assume they found some kind of potion to fix this," Hermione responded. "That would explain why they're not switched back yet, but they're not here in the library everyday, looking for an antidote."

"I don't know much about this body switching business, but I can tell you one thing," Ron said. "This is going to be an interesting Christmas."

"BILL!"

Bill Weasley jumped, splattering ink all over his desk as his two brothers rushed inside, looking so pale and worried, he nearly had a heart attack right then and there.

But yes, Fred and Percy looked like they were on the verge of a panic attack.

"It's getting worse," They said in unison.

"What is?"

"The Merge," They said in tandem.

"Oh, no, I almost forgot about that," he muttered. "Come on, we have to hurry."

He ushered them on to Professor Snape's office, thanking Merlin that it's Sunday and there were no classes. That would be an awkward conversation to have in front of the entire class.

"Professor," he said, practically bringing down the door as he banged it open.

"Yes, Mr. Weasley?" Snape drawled.

"Their brains are merging; what do we do?"

That got Snape's attention.

"Well... this is the most difficult part when it comes to the Switch, even more so than finding a way to switch back, but there is a way. I cannot speed up the potion making process; that may do more harm than good. I can't stop it, but I can slow it down."

He stood and rummaged through his potion cabinet, in search of those two vials that he'd made months ago.

"I made a potion to slow it down. At the third month, the Merge speeds up, but by taking this potion every Sunday morning until the potion is ready, you can slow the merge down to give us some time."

"How do you know so much about this, Professor?" Bill asked.

Snape was glad that he was facing the potions cabinet as it hid his tiny, almost nonexistent smile.

"Well, believe it or not, I've dealt with this before. When I was in school, my friend, Regulus, accidently switched bodies with his brother, Sirius. So you can say that I'm experienced when it comes to DNA CHROMOSOME."

He knew the brothers were exchanging glances behind his back, and he didn't blame them. I mean, this isn't something that happens everyday, and for him to experience it twice in a life time must be quite the shock.

He finally found it, stored in the back, and placed them on his desk.

Two vials of clear liquid that could make or break this entire incident.

"Now, pick them up," he told them.

Percy and Fred obeyed, moving in a singular motion.

Percy's vial turned emerald green whilst Fred's turned a vibrant orange.

They looked confused at the color change, and Snape smirked. That never ceased to surprise people.

"I make the potion a certain way, but if a person were to drink it like that, it would kill them. Therefore, the potion adjusts itself according to touch, hence the color change. This is because it has to fit both your mind and body, so magic can alter the ingredients and the amounts accordingly. Drink the entire vial every Sunday morning, and it'll refill automatically. Start now."

Fred and Percy didn't say a word (probably because it would come out in unison or one would repeat the other) as they uncorked the vials and chugged their contents.

For a moment, none of them seemed willing to say a word.

Finally, Fred said, "Did it work?"

They held their breath, waiting to see if Percy would repeat it. He didn't.

"Thank you, Professor," Bill told him.

"You're welcome. Now, you best be going. People will start to wonder where you're at."

The spell wasn't working as well or as fast as he hoped, but it was working. The cold Percy was experiencing was only the first step; nightmares was the next step, and that was his way into the mind of Percy Weasley.

And so as Percy laid his head down to sleep, Tom Riddle snapped his fingers and the night terrors began.

"Good luck, Percy Weasley," he whispered. "You're gonna need it."

Bye for now!