Author's Note: My friends, you will not believe the trouble I have had writing this chapter. I had an idea about how this was going to go, but then I didn't like the idea and had to start from scratch. I then got a case of tremendous writer's block, but at last I struggled out a chapter. Even after all that work, this is an incredibly short chapter (one of the smallest I've written) so I apologize. You've all waited a long time, and it's not fair of me to keep you waiting, and then post a short chapter. At least it hasn't been a month this time.

-Elise (Daisydot227)

DISCLAIMER: I DO NOT own Percy Jackson, or Harry Potter. All credit goes to Rick Riordan and J.K. Rowling.

Chapter 4: In to Action

Percy's POV:

Percy, in all his years of mischief, had to admit, their plan was genius. Of course, there were so many variables that could go wrong, but Percy didn't want to think about that. No, no. Worrying was Annabeth's job.

Percy, on the other hand, wasn't worried a bit as he, Ron, and Harry waited just around the corner from the bathrooms. They sat on a window ledge waiting for the Slytherins to enter the bathrooms to take their showers. Ron and Harry were playing a game of cards (cards that talked, of course) while Percy sat staring intently down the hallway.

"Percy, you know you don't have to keep watch," Ron said, examining his hand.

"Yeah," Harry agreed, throwing down a card on to the pile. "We'll be able to hear them coming from a mile away."

Percy smiled. "Yeah, I know. I just need something to do."

Ron drew several cards from the deck. "Join us, Percy. Harry and I will deal you in."

"Nah, I'm fine," he said, shrugging.

Ron was about to reply when Percy froze, putting a finger to his lips.

"You hear that?" he whispered. "They're here."

The sounds of bumbling Slytherin rose in the air as the entire second year entered the girl's and boy's bathrooms.

Percy, keeping his finger to his lips, slowly snuck along the wall and peered around the corner. As soon as the last Slytherin entered the bathrooms, he dashed across and locked door to the girl's bathroom.

"Now is the time for revenge," he said, smiling evilly.

Percy listened through the door to the boy's bathroom and waited until he heard the showers turn on. Once they did he opened the door and peered inside. In the center of the rooms stood a pile of wizard robes. Each of the boy's grabbed a pile and tried to sneak out, but Ron's sneakers squeaked on the tile floor.

"You hear that?" The sound of Draco Malfoy's voice cut across the loud showers. "It sounds like someone's here." Draco's head peeked out from behind a shower curtain and his eyes widened in surprise. A second later, Draco and three of his lackeys all stood with towels wrapped around them.

"Well shit," Ron said, and they all ran out of the bathroom, Draco and his friends in pursuit.

Ron and Harry ran to the right, and Draco and his group followed them. Percy turned left, then doubled back and locked the rest of the boys in the bathroom. He then turned back around and raced down the hallway until he saw Fred and George.

"Where were you?" George asked as Percy ran up.

"We got side tracked. Now there's four angry Slytherins running around Hogwarts half naked."

Fred and George laughed, and Fred took off running to carry the message to Annabeth.

"Here hide these," Percy said, handing the clothes in his arms to George. "I have to watch the bathrooms and make sure no one gets out."

Percy sprinted back down the hallway.

Annabeth's POV:

After 5 minutes of waiting, Annabeth was officially worried. Fred was supposed to have arrived already, and he was nowhere in sight.

"Do you think he got caught?" Penelope whispered to Annabeth.

"He can't get caught," Annabeth said firmly. "He's the only one with the passcode."

A moment later, Fred appeared as he skidded around the turn and ran up to the girls.

He recited the password, and the hole to the common room opened.

"That's amazing, Fred!" Pavarti squealed. "How did you find the password?"

He grinned impishly. "There's always a Slytherin who can be manipulated. You just have to find the right one."

"Come on everyone," Annabeth instructed them. "We have to hurry."

As the group filed inside, they all gathered around Annabeth.

"Remember what we discussed," she said. "You all remember the spell?"

Everyone nodded and took out their wands, and began reciting the curse. Moments later, a green slime began running down the walls, and leaking on to the floor.

"Keep going," Annabeth prodded them. "We need lots of it."

The common room was soon covered in a thick layer of the green slime which smelled rancid. The girls raced up to the female dormitory, and Fred entered the boy's dormitory.

Annabeth stood in the common room, making sure no one came inside. The girls came down the stairs first, and Fred followed along soon after.

"Everything's covered in slime?" Annabeth asked, and they nodded.

"Good. Let's go," Penelope said. "This smell is giving me a headache."

The group climbed out of the common room, and headed towards the Ravenclaw common room.

"Let's go celebrate!" Pavarti squealed, and everyone chorused with agreement.

"I'll catch up with you later," Annabeth said. "I'm going to look for Percy."

She found him still sitting against the wall outside the bathrooms. He stood up when he saw her coming.

"Finally," he said. "Did everything go as planned?"

"Pretty much. The Slytherin common room is officially full of magical slime that cannot be removed by any magical means."

Percy looked at her. "How are they supposed to get rid of it?"

Annabeth laughed. "With a mop."

They walked down the hallway side by side, Annabeth recalling the story.

"Mr. Jackson and Ms. Chase what do you think you're doing?" A sharp voice rang out from behind them. They turned slowly and saw Professor McGonagall staring at them with cold eyes.

"Just going to our common rooms," Percy muttered.

"Don't even think about lying," she commanded. "I heard the entire story, so really you've just confessed."

She turned on her heel and rushed down the hallway, her velvet green robes flying. Percy and Annabeth exchanged a look, and followed her.

To be 100% honest, I do not like that chapter all too much. I felt like I needed to update. Either way, I'd like to hear what you think, so please review!