Night came late to Hogwarts.
Or perhaps the day simply refused to end.
Even after the tournament finished, the castle remained noisy for hours. Students argued about the match, exaggerated what they had seen, and tried to decide whether Theodore Snow fighting a hand from the pitch counted as part of the official score.
Fred and George were already collecting opinions.
Professor McGonagall confiscated the parchment before they could add a betting column.
By dinner, everyone was exhausted.
By curfew, most students finally returned to their common rooms.
By midnight, Hogwarts became quiet.
Then Theodore left the castle.
Dumbledore was already waiting near the entrance.
He had changed out of his tournament robes. His cloak was dark, his wand rested in his hand, and Fawkes perched silently on his shoulder. There was no smile on the old wizard's face now.
Theodore walked down the steps.
"Professor."
"Mr. Snow."
They looked toward the Black Lake.
The water was calm.
Too calm.
Theodore disliked that kind of calm. It usually meant something underneath had decided to watch.
Dumbledore began walking first.
"May I ask how much danger we are approaching?"
Theodore thought for a moment.
"Enough that students should not come."
"That is not a number."
"It is the useful part."
Dumbledore sighed. "You and Severus have more in common than either of you would enjoy admitting."
Theodore smiled. "That is a cruel thing to say."
"I have been saving it."
They reached the lakeshore.
Moonlight lay across the water like thin silver cloth. The giant squid was nowhere to be seen. Even the small creatures near the bank had disappeared.
The lake knew.
Or rather, the thing beneath it had warned them away.
Fawkes shifted on Dumbledore's shoulder.
The phoenix's flame brightened slightly.
Theodore stepped to the edge of the water.
"We need to talk."
The lake did not move.
Dumbledore glanced at him.
"Is that usually enough?"
"No."
Theodore raised his hand.
A thin strand of Yimu Divine Light touched the surface.
The lake trembled.
Then the ancient voice arrived.
Tired.
Annoyed.
"You again."
Dumbledore's eyes changed.
He could not fully hear the words, but he felt the meaning brush against his mind like a mountain turning in its sleep.
Theodore said, "The formation failed."
"I noticed."
"The final trace ran below your prison."
"I noticed that too."
"Then you know why we are here."
The lake remained silent for several breaths.
Then the water near the shore sank.
A path appeared.
Not a real path.
The lake did not split in half like a storybook miracle. Instead, the surface curved inward, forming a dark slope of water and shadow that led down into the depths.
Dumbledore looked at it.
"Inviting."
"It is not an invitation," Theodore said. "It is permission."
"That distinction is not comforting."
Theodore stepped onto the path.
The water held beneath his feet.
Dumbledore followed.
Fawkes spread his wings slightly, phoenix flame keeping the cold away.
The path descended into the lake.
Water rose around them on both sides, dark and heavy. Strange shapes moved in the distance and quickly fled. The deeper they went, the quieter the world became.
Dumbledore's expression grew more serious with every step.
He had known Hogwarts was old.
He had known the founders had built on older ground.
But knowing and seeing were different things.
Ancient runes appeared on the stones below.
Not Latin.
Not Greek.
Not any magical script commonly taught in Britain.
They were older.
Some were broken.
Some still glowed faintly.
Chains crossed the lakebed like black rivers.
Huge chains.
Each link was larger than a carriage, covered in scars, symbols, and marks of repair from different ages. Some chains sank into the earth. Some vanished into the water. Some stretched toward places that did not seem to exist in ordinary space.
At the center of those chains lay the ancient being.
Dumbledore stopped.
Even Theodore paused for a moment.
Most of the creature's body remained buried beneath stone, silt, and darkness. Only part of its head and one enormous eye were visible. Golden light glowed beneath the eyelid, dim but alive.
It was not a dragon.
Not a serpent.
Not a beast from any textbook.
It looked like something the world had forgotten how to name.
Fawkes gave a soft cry.
The golden eye opened.
Dumbledore's hand tightened around his wand.
Theodore spoke first.
"You said something below you woke."
The ancient being's gaze moved from Theodore to Dumbledore.
It lingered there.
"Another old blood."
Dumbledore's eyes narrowed slightly.
"You know my bloodline?"
"Fragments."
The voice did not enter his ears.
It pressed meaning directly into thought.
Dumbledore stood very still.
For the first time in many years, someone had looked at him and seen something even he did not fully understand.
Theodore noticed the change.
Good.
The Dumbledore bloodline problem had finally touched the surface.
But tonight was not about that.
Theodore looked at the chains.
"What is below?"
The golden eye slowly moved downward.
For a long moment, the ancient being did not answer.
Then it said, "A mistake."
Dumbledore's voice was quiet.
"Whose mistake?"
"Ours."
The water became colder.
The chains gave a faint groan.
The ancient being continued, "Long ago, when the sky broke and the old war crossed worlds, some things could not be killed. Some could not be sealed outside. Some were buried."
Theodore's expression sharpened.
"Under Hogwarts?"
"Before Hogwarts."
Dumbledore's face changed.
Before Hogwarts.
Before the founders.
Before the castle.
Before the lake had a name, perhaps.
Theodore asked, "What is it?"
The ancient being closed its eye halfway.
"A dream that learned hunger."
Dumbledore's wand lifted slightly.
Theodore understood more than he did.
Great Old One influence.
Faith.
Wish power.
Ancient wizard blood.
A dream that learned hunger.
That phrase fit too many things.
The final trace of the hidden will had fled below this prison because something there could receive it.
Or eat it.
Or awaken through it.
"Can it come out?" Theodore asked.
"Not yet."
That was not a good answer.
Dumbledore seemed to agree.
"What keeps it sealed?"
The ancient being gave a low laugh.
The chains shook with it.
"Me."
Theodore looked at the countless chains.
Now he understood.
This creature was not only imprisoned.
It was part of the seal.
The chains held it down, but its body also pressed something else down.
A prisoner used as a lock.
No wonder it was tired.
Theodore stepped closer.
Several chains tightened.
Fawkes flared.
Dumbledore's wand rose.
Theodore stopped just before the warning became attack.
"The formation tried to use your chains."
"Yes."
"If it succeeds later, the thing below wakes."
"Yes."
"And if I strengthen your prison?"
The golden eye focused on him.
The water stilled.
"Then I remain chained."
Dumbledore looked at Theodore.
The question was silent but clear.
Theodore did not answer immediately.
He understood the problem.
Strengthening the seal would protect Hogwarts.
It would also continue using this ancient being as part of the prison.
Releasing it might be fair.
It might also free whatever was below.
Fairness and survival rarely made clean friends.
Theodore looked at the golden eye.
"What do you want?"
Dumbledore turned slightly.
He had not expected Theodore to ask that.
The ancient being was silent for a long time.
So long that the lake above them seemed to forget how to move.
Finally, it answered.
"To sleep without being eaten."
Simple.
Not freedom.
Not revenge.
Not worship.
Just sleep without the parasite gnawing at its chains.
Theodore nodded.
"That can be arranged."
Dumbledore looked at him.
"You can separate the seal from the wound?"
"Not completely."
Theodore touched the air.
A small green-gold pattern appeared above his palm.
"The Wuzhuang foundation has taken pieces of the Ten Absolute Arrays. It can recognize the thing that was feeding on the chains. I can build a layer above your prison. Not to strengthen the chains. To keep parasites away."
The ancient being stared at the pattern.
For the first time, something like interest entered its eye.
"Zhen Yuanzi."
"Part of his path."
"Too small."
Theodore smiled. "For now."
The ancient being gave another tired laugh.
"Unreasonable."
Dumbledore's eyes softened.
He was beginning to understand why the old creature kept saying that.
Theodore did not ask for trust.
He raised his hand and sent a thin Wutu light into the lakebed.
Not into the chains.
Around them.
Yimu followed, growing like moss over ancient stone, careful not to touch the main seal. Willow Immortal's roots did not enter the lake, but their shadow appeared through the Wuzhuang foundation, forming a distant support from the shore.
The new layer was thin.
Very thin.
More warning line than wall.
But the moment it formed, black residue hidden along several chain links began to hiss.
Dumbledore's wand flashed.
Phoenix fire from Fawkes descended.
The black residue burned.
The ancient being closed its eye for a moment.
The pressure around it eased.
Only a little.
But after countless years, even a little was enough to notice.
Theodore lowered his hand.
"Done."
"For now," the ancient being said.
"For now."
The golden eye opened again.
This time, it looked less annoyed.
Only slightly.
"The thing below will remember you."
Theodore smiled.
"It can wait in line."
Dumbledore gave him a sidelong look.
"Do all your enemies require appointments?"
"The organized ones."
The ancient being rumbled.
It might have been laughter.
The water path behind them began to rise.
Permission was ending.
Before they left, Dumbledore looked at the creature.
"May we know what to call you?"
The golden eye stared at him.
Names had weight.
Old names had danger.
The being remained silent.
Then it gave an answer.
"Gatekeeper."
Dumbledore bowed slightly.
"Then thank you, Gatekeeper."
The creature closed its eye.
"Do not thank the lock."
The water rose higher.
Theodore and Dumbledore returned along the dark path. Behind them, the chains faded into the depths. The lake closed over the ancient prison as if nothing had happened.
When they reached the shore, the moon had shifted.
For a moment, neither spoke.
Then Dumbledore said softly, "Before Hogwarts."
Theodore looked at the castle.
"Yes."
"There is a great deal beneath my school that I was not informed about."
"That seems to be a Hogwarts tradition."
Dumbledore laughed, but there was little humor in it.
From the castle, a faint green-gold pulse spread through the grounds.
Willow Immortal had accepted the new outer layer around the lake prison.
The Wuzhuang foundation was no longer limited to the castle and pitch.
It had touched the lake.
Deep below, something old shifted again.
This time, it did not wake.
It listened.
Theodore looked toward the dark water.
The tournament was over.
The Ten Absolute Arrays were broken.
Voldemort was bound.
The hidden will had been wounded.
And now Hogwarts had revealed one more secret.
The school was not built above treasure.
Nor merely ancient magic.
It was built above a lock.
And something below the lock had heard his name.
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