Percy Jackson and The Wizarding World

Percy had faced many things in his life—Cyclopes, Titans, and the occasional god with a grudge—but nothing quite prepared him for the nightmare that was Hogwarts' midterm exams.

"This is cruel and unusual punishment," Percy groaned, staring down at the ridiculously long essay prompt in Transfiguration. "If I survive this, I should get a medal."

Hermione huffed from beside him, her quill flying across the parchment. "It's just an essay, Percy. Honestly, if you applied yourself—"

"Yeah, yeah," Percy interrupted, slumping further into his seat. "Look, I've fought monsters with half a plan and even less sleep, but this? This is worse than facing Kronos."

Harry chuckled from across the table. "You'll get used to it. Eventually."

Ron, who was slumped next to Percy, groaned. "Don't listen to him, mate. I've been here for years, and I'm still not used to it."

As Hermione rolled her eyes and continued writing, Percy's thoughts drifted back to the discovery in the library. The legend of the Lost Guardian kept nagging at him like a bad omen. He wasn't a fan of prophecies—they had a way of messing with his life—but if Hogwarts had a guardian connected to the Mist, then it meant there was more to his presence here than the Fates had let on.

Just as he was considering sneaking out for some fresh air, something caught his attention. Across the Great Hall, Malfoy was huddled with his usual cronies, but he was acting strangely. He kept glancing around nervously, his hands clenching and unclenching on the table.

Percy narrowed his eyes. "Something's up with Malfoy."

Harry followed his gaze. "Yeah… he's been acting off ever since the Chamber incident. Think he knows something?"

Percy nodded. "Yeah, and I think it's time we found out what."

Later That Night – Slytherin Common Room (Undercover Mode, Again)

Harry's invisibility cloak had become Percy's new favorite magical item. He was convinced Annabeth would have traded an entire armory of celestial bronze just to have something this useful at Camp Half-Blood.

Sneaking through the corridors of Hogwarts was becoming second nature to Percy, though he still struggled with the whole "quiet footsteps" thing. Harry and Hermione moved like shadows; Ron… not so much.

"Shh!" Percy whispered as Ron nearly tripped over a suit of armor. "Dude, you'd make a terrible thief."

"I'm not used to sneaking around in the middle of the night!" Ron hissed.

Hermione rolled her eyes but stayed focused as they approached the entrance to the Slytherin common room. The walls were lined with serpent carvings, their emerald eyes glowing eerily in the dim torchlight.

"Alright, Harry," Percy whispered. "Time for your snake talk."

Harry nodded, stepping up to the entrance and whispering in Parseltongue. The door slithered open, and they quickly slipped inside.

The common room was dark and filled with green light from the underwater view of the Black Lake. Shadows danced across the stone walls as fish swam by outside the windows, creating an eerie effect.

"Okay," Percy whispered. "Let's find out what Malfoy's hiding."

They spread out, checking the room carefully. Percy moved toward a corner where a stack of books and parchment lay scattered on a table. He picked one up and squinted at the title. Pureblood Traditions and the Ancient Bloodlines.

He frowned. "This guy really leans into the whole superiority thing, doesn't he?"

Ron peered over Percy's shoulder. "Yeah, and look—he's been writing notes in the margins. 'Heir of Slytherin—legacy remains hidden.' What's that supposed to mean?"

Percy's gut twisted. "It means he knows more than he's letting on."

Before they could investigate further, a sudden creak echoed through the room. Percy froze.

Footsteps.

"Hide!" Harry whispered harshly, and they scrambled behind a large, snake-shaped couch, yanking the invisibility cloak over themselves just in time.

Malfoy walked in, looking around nervously before pulling out an old book from his robes. He sat down, flipping through the pages, muttering to himself.

"It has to be here somewhere," he whispered. "Father said the chamber was just the beginning…"

Percy's eyes widened. What chamber?

Ron shifted beside him, whispering so low it was almost inaudible. "What's he talking about?"

"I don't know," Percy whispered back. "But it sounds bad."

Malfoy's expression darkened. "If Potter thinks he's stopped the Dark Lord's plans, he's wrong. The true power lies… elsewhere." He shut the book with a snap and stalked toward the exit.

Once the door shut behind him, Percy pulled off the invisibility cloak. "Okay, we definitely need to talk to Dumbledore."

Hermione picked up the book Malfoy had been reading. "Percy, look at this."

Percy leaned over, reading aloud. "'The Keeper's Vault—an ancient chamber hidden within the foundations of Hogwarts, accessible only by those who possess knowledge of both divine and magical heritage.'" He frowned. "Okay, now this is getting personal."

Harry's expression was serious. "You think this has to do with you?"

Percy sighed. "I mean, it kinda sounds like it, doesn't it? Divine and magical heritage? That's literally me."

Ron groaned. "Great. Another hidden chamber? Can't this school go one year without one?"

Hermione shut the book. "If Malfoy's looking for it, that means whoever's behind this whole thing hasn't given up yet."

Percy smirked. "Well, good news—neither have we."

The Next Day – Dumbledore's Office

Dumbledore listened intently as Percy and the others recounted their findings. His expression remained calm, but there was a flicker of concern in his wise blue eyes.

"The Keeper's Vault," Dumbledore murmured, steepling his fingers. "A place of legend, known only to a few. If Mr. Malfoy has discovered its existence, it means that the forces at play are growing bolder."

Percy crossed his arms. "Yeah, and if it's got anything to do with divine magic, that means I've got to get there before Malfoy does."

Dumbledore's eyes twinkled. "Indeed. But be cautious, Mr. Jackson. The vault is said to contain knowledge and power beyond comprehension. It would not be wise to rush in unprepared."

Hermione, as usual, already had a plan forming in her head. "Professor, do you think the vault could be tied to the ancient Mist? If the Fates brought Percy here, maybe this is what they meant."

Dumbledore nodded slowly. "Perhaps. The Mist hides much, and it is not often that the worlds of gods and wizards intersect so directly."

Percy exhaled. "Alright. I'll take it one step at a time. But if Malfoy and his lot are sniffing around, we can't wait too long."

Dumbledore smiled. "I trust you'll do what is right, Mr. Jackson."

Percy grinned. "No pressure or anything."

As they left the office, Harry turned to Percy. "So… looks like you've got another quest."

Percy rolled his eyes. "Yeah, and I'm really hoping this one doesn't include giant snakes. Once was enough."

Ron patted him on the back. "Knowing our luck? It'll be worse."

Percy sighed. "Of course it will."