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The Trench and the Crown or Of Pearls and Shadows or ⚜️𝓢𝓱𝓪𝓭𝓸𝔀𝓥𝓪𝓷𝓲𝓵𝓵𝓪⚜️

Summary:

Pure Vanilla Cookie descends into the sea’s depths after his ship is destroyed, surrendering to the ocean’s call. But in the trench below, a dark, ancient force is waiting. Shadow Milk Cookie, ruler of the deep, saves him—not out of mercy, but fascination. Drawn to Pure Vanilla’s calm, unclaimed soul, he claims him as his own.

What began as a fall becomes a binding.

The sea doesn’t just take.
Sometimes, it chooses.

 

(MER AU 🥀🧍‍♂️🎊🎊✨𓆩 ShadowVanilla 𓆪✨)

 

(Discontinued 💔)

Notes:

Uhhh this is my first fanfic sooo comment what you think or wtv

Chapter Text

The sea had always whispered to him.

Not in the way it did to other sailors who were his friends — with siren songs or storm-born threats — but with ancient truths buried in foam and time.
Pure Vanilla stood at the helm of the Star’s Mercy, the wind catching in-between his robes, the sun glinting in strands of his golden hair. His eyes cradled in long white eyelashes, warm but haunted, scanned the endless blue with a clarity that belonged more to dreamers than saviors.

He was not just a captain. Not anymore.
He was awakened now — touched by relics dredged from temple ruins and maps scrawled in languages older than the tides. He carried pieces of the sea’s forgotten memory in every line of his hands, every glance into the horizon.
And he knew: something was calling to him from the deep.

“Unnatural currents ahead,” his first mate warned a cookie with a gruff voice.

“We should turn back, Captain.”

But Pure Vanilla only smiled faintly, stepping forward as the wind died — the sea around them suddenly still as breathless silence. The waters glistened like glass... but beneath the surface, shadows danced.

He’d heard the legends. Of the Trench Walker. Of merfolk with eyes like stars and teeth like coral. Of cursed depths and kingdoms long drowned.
But legends were just that — stories. And stories were meant to be followed sometimes leading to doom while other priceless treasures
As the sky darkened and the compass spun itself into madness, he felt it.
A presence, like eyes watching from the blackness far below the keel. Not malevolent. Not quite. Just... lonely. Familiar. Ancient.

Pure vanilla took a deep breath….And with a swift turn and flick of his long slender wrist he singled his crew to turn the boat around.

The crew leapt into motion at the Captain’s signal, sails creaking and ropes snapping taut as they began to shift course — but the sea did not care for obedience.

"Wind’s dying too fast!" came a shout from above.
The clouds had thickened like bruises across the sky. The sails flapped helplessly, then stilled. The Star’s Mercy groaned like something ancient was clawing up from beneath its hull.

Pure vanilla felt a small sense of dread as he watched his crew work in shambles.
The rocks that stemmed and surrounded them look sharper and more painful up close.

From the portside, a familiar voice broke the tension.

“This is the part where something definitely jumps out and eats us, isn’t it?”

GingerBrave, ever the boldest of fools, leaned out from the railing, hands cupped over his eyes like a mock telescope. His energy was sunshine cracking through mist, a flicker of laughter in the storm’s teeth.

Pure Vanilla stood tall and let his small facade crack a little he let out a small laugh and looked at ginger brave.
His eyes had a small bit a mirth in them he couldn't help it.
He knew what he signed up for..

“Maybe” He said that was all he could say.

Behind him, Strawberry Cookie gripped her oversized book of sea lore, wide-eyed and shaking.

“It says here the Trench Walker devours ships in exactly these conditions…”
“GingerBrave, get away from the edge!” she squeaked.
“We’re literally checking every cursed box!”

Pure vanilla couldn't help but role his eyes at strawberry cookie she was always in some book or watching mer from afar.

Wizard Cookie was muttering incantations under his breath, sparks flickering uselessly from his staff. His hat had already flown off once.

“The ley lines are tangled. Something is distorting magic itself. I should’ve stayed in bed.”

Muscle Cookie braced at the mast, gripping the rigging like he could punch the sea itself.

“If the ocean wants a fight, let it come!”

Pure Vanilla barely turned. His expression remained calm, but inside him, something was coiling — not fear, not exactly. Anticipation. Like a note of music just before it breaks into melody.

He stepped down from the helm, his boots silent against the soaked deck. GingerBrave turned toward him, eyebrows raised.
“Captain? Are we actually turning back?”

“We tried,” Pure Vanilla murmured, golden and light blue eyes narrowed. “But I think the sea has already decided.”

He turned back toward the bow, eyes fixed on the shifting horizon where sky and water blurred. The storm was close now — closer than it should’ve been.

“Keep forward,” he said simply.

It wasn’t a command.
It was a surrender — not of will, but of resistance.
To fate.
To the ocean.
To whatever waited just beneath the surface

And his crew — loyal, weathered, brave in their own chaotic way — followed his order without much of a second thought.
Not because they weren’t afraid, but because it was his voice that spoke. And when Pure Vanilla spoke, even the sea seemed to listen.

They scrambled to drape lines and secure the sails, desperate to wrest back some small thread of control — maybe just enough hope to keep the ship above water.

But the truth hung in the salt-heavy air.

The lifeboats? Useless.
The waters below churned with dark shapes — sharks, shadows, worse — and the surrounding rocks were jagged like broken glass, steep and slick, waiting to impale anything that dared try escape.

There was no safe shore.
No clear miracle.

Pure Vanilla stood at the edge of the deck, eyes scanning the flurry of movement — Strawberry clutching her book to her chest, Wizard casting without aim, Muscle Cookie yelling orders louder than the wind, GingerBrave still gripping the wheel with stubborn courage.

He let the scene settle in his chest like sand
Then, with a quiet breath, he turned and descended into the cockpit — the storm muffling behind the thick wood and silence of the captain’s quarters.
There, beneath a cabinet of soaked maps and glowing fragments of long-lost relics, he found a slender bottle — half-full with amber-gold liquor. He poured it into a chipped glass and watched it swirl.

His hands were steady.

Not in denial. Not in fear. Just ready.

He raised the glass — not in toast, not in surrender.
Just as a final act of grace.

“For what’s to come,” he whispered.

And somewhere, far beneath the crashing waves,
something heard him.

 

…………………………………………………….................................................

The trench didn’t welcome light.
It never would — or could.
At least, not like it used to.

Not because it feared it.
But because it had no use for it.

Here, in the deepest folds of the ocean floor, the water pressed against the world like a heartbeat long forgotten.
Black coral clawed upward like frozen fire.
Eelgrass shivered without current.
Jellyfish pulsed in slow, dreamy convulsions — feverish glows in a kingdom that had drowned long ago.

And in the stillest point —
he waited.

Shadow Milk Cookie lounged half-draped along a stone altar at the edge of a ruined city, his tail coiled beneath him in slow, deliberate curls.
Midnight-black scales glimmered with hints of violet and icy white.
Jewels — diamonds, rubies, black pearls — clung to his skin and hair like stolen secrets. They adorned his long arms, twisted around claw-tipped fingers in bands of gold.
White and cyan-blue lashes shadowed piercing eyes, each cheek marked by a solitary pearl beneath his eyes — like tears he refused to shed.

He didn’t blink.
Didn’t need to.
He saw everything

The trench was his to command.
His shadows threaded through the currents like serpents, brushing every sunken hull, every drifting bone, every whispered legend still echoing from the surface.

Above, the water trembled. A vibration.
A ship.

Too heavy. Too slow. Too alive.

“Another fool drifting too close,” he murmured, voice low, rich — black velvet and crushed glass.

Then the current shifted.

Not just a ship.

A presence.
Familiar.
Forgotten.

“Let them pass,” came a sharper voice behind him. “They’ll tear themselves apart before they hit the reef.”

Burning Spice Cookie.
Hot-blooded. Beautiful. Dangerous.
He swam into view with the fire of a dying star. His tail shimmered like molten stone, and every flick of his movement cut through the water with purpose.

Their bond was forged not in softness, but in necessity — all teeth and shared wounds. Not love, but survival.

Shadow Milk didn’t turn.

“It’s not them I’m watching,” he said, slower this time. “It’s what’s with them.”

Burning Spice sighed, irritated, but not surprised.

“Your trench is full of ghosts and muttering relics. Don’t start again. You think everything down here is destiny.”

Shadow Milk said nothing.
Instead, he lifted one arm — pale under the shadows, dripping with gold and encrusted stones — and traced a single clawed finger through the water.

A plume of darkness curled upward.
It slithered toward the surface, invisible to most, winding like ink spilled across a map.

Around them, the reef pulsed.
Statues of drowned gods stirred in their sleep. From their mouths, water bled in reverse.
Runes blinked open, one by one.

The trench awakened.

His eyes sharpened.

There was something approaching — not violent. Not loud.

Just… gentle.
Soft like prayer.
And completely, utterly wrong.

He rose. His tail unfurled with slow grace, powerful and silent.
Shadows arched from his back like wings, and the sea curled around him like a throne remembering its king.

“Someone’s knocking,” he murmured, tilting his head.
Then a slow, hungry smile.
“I want to see who answers.”

He let the silence stretch. Then, with a flick of his tail and a glint of fang:

“Who knows…”
He grinned.
“I might get a new plaything.”

…………………………………………………….................................................

The last thing he saw was water.

Not just a wall of it — but a whole sky turned upside down, rushing to claim him.
The last thing he heard was the shouting. His crew.
Trying.
Fighting.
Scrambling for lifeboats they barely believed in, even as jagged rocks and circling fins made every option a gamble.

He didn’t move.
Didn’t scream.
Didn’t reach for them.
There was no panic. No flailing.

There was only stillness.

Not regret.
No — never regret.

His life, before all this… it had been too perfect. Too gilded.
And the kind of perfection they gave him in the palace felt like something hollowed out and dipped in sugar.

He remembered it in fragments — his robes heavy with gold embroidery, his throne cold beneath him, the way suitors had looked at him like he was a crown to be worn, not a heart to be held.

What did love even mean, in a kingdom where everyone already claimed to adore you?

He had smiled through all of it. He had bowed.
But gods — he had been suffocating.

That’s why he left.

He had called it a “spiritual awakening,” and the kingdom had believed it, eager to send him off with blessings and songs and a handpicked crew.
But he was already awakened. Not in the way they thought.
He didn’t need more magic.

He needed more life.

And for a while… he had it.
He remembered every moment of it as the ship groaned and cracked above him — like a film reel flickering behind his eyes:

The thrill of salt wind on his skin.
The soft smiles of strangers who didn’t know he wore a crown.
The joy of being seen as just a traveler, not a symbol.
Fishing at dawn. Fires lit on beaches.
Narrow escapes. Near-death laughs.
Merfolk bringing them fruit just because they were kind.

It had been imperfect. Unstable. Real.

And now it was ending.

Wood cracked. The mast tore in two. Something exploded in the dark.
The Star’s Mercy folded in on itself like paper, dragged down by its own name.

And as the cold wrapped around him like silk, Pure Vanilla let go — arms open, weightless, watching the light above fracture.

He didn’t feel fear.
Only acceptance.
And the faintest, most traitorous hope…

That something might catch him.

……………………………………………………................................................

The surface cracked like glass.

Splinters of moonlight shattered into the deep as the ship — The Star’s Mercy — broke in two. The sounds of it were distant, dulled by pressure and depth, but they reached him all the same:
The groan of wood. The screech of nails. The sound of something proud unraveling.

Shadow Milk floated, motionless, his body suspended in the trench’s dark cradle like a god carved from velvet and bone.
The reef around him pulsed, sensing change.
Even the shadows leaned forward, coiling, curious.

“There it goes,” Burning Spice muttered beside him, arms crossed, tail flicking with irritation. “Should’ve let it shatter on the reef like the rest.”

But Shadow Milk didn’t answer.

His eyes were locked on a shape — not the ship.
Not the debris.
Not the frantic crew scattering like frightened fish.

Him.
The one made of gold and softness.
The one who didn’t fight.

Pure Vanilla.

He was falling slowly, like something out of place in this world — too delicate for the trench, too real to be imagined. His robes bloomed around him like a dying flower. His hair fanned out in gentle curls, catching what little light still dared descend.

No fear.
No struggle.
Just surrender.

Shadow Milk narrowed his eyes, and for the first time in a very long time, he moved.
He surged forward in a twist of black water, jewelry glinting like stolen stars, the trailing ends of his tail cutting through the dark like ink. His shadows followed, silent, weaving around the wreckage as sailors scrambled for lifeboats above. But he didn’t care for them.

“You’re going after him?” Burning Spice asked, his voice sharp now. “You don’t even know what he is.”.

Shadow Milk didn’t break stride.

“That’s exactly why I’m going.”

He was drawn in — not by power. Not by magic.
But by the stillness.
The calm in Pure Vanilla’s descent. Like he belonged here. Like the sea had finally reclaimed a piece it didn’t know it lost.

And that expression.
Eyes closed, arms open.
Like he knew someone would catch him.

Foolish, Shadow Milk thought.
Foolish to trust the dark to hold you.

And yet, as the body continued to fall — through the cold and current — he reached out.

His arms wrapped around Pure Vanilla before he hit the trench floor.
His touch was unexpected: careful, firm, almost reverent.

He studied him up close — long lashes like snow dusting his cheeks, lips parted slightly like he’d fallen asleep in prayer.

“Beautiful,” Shadow Milk whispered, quietly, more to himself than anything.

Not in the way surface cookies meant it. Not in the way Burning Spice ever was.
This was a different kind of beautiful.
A fracture in the dark. A softness no abyss should hold.

His shadows curled protectively around them both, forming a slow spiral of ink and movement.
From above, the last pieces of the Star’s Mercy sank like petals from a ruined crown.

And deep within the sea, beneath gods and wreckage and ruin —
Shadow Milk Cookie smiled.

“Mine now.”

……………………………………………………..................................................

The surface was too loud.

The air stung his gills. The salt burned in a way the trench never did — raw and open. But Shadow Milk didn’t flinch. He had one task, and his arms were already full of it.

Pure Vanilla Cookie.

He broke the surface with him draped in his arms like something fragile and holy, sea foam clinging to his curls, pale skin slick with brine. Shadow Milk moved with a predator’s grace, swimming toward the jagged rocks that jutted from the waves like broken teeth. With one clawed hand, he lifted them both onto the sturdiest ledge — a black slab of volcanic stone, slick with tide and long-abandoned by seagulls.

The moment they touched solid ground, Shadow Milk flicked his tail with a ripple of magic. A dark shimmer traced over Pure Vanilla’s chest.

A clearing spell.

The water trapped in his lungs hissed out between parted lips like smoke escaping a lantern.

Pure Vanilla gasped, his chest jerking upward as his body jolted back to life. His eyes fluttered — dazed, confused, still full of stars and not yet recognizing where he was. His lashes stuck together with salt. His breath was shallow, but steady.

Alive.

Shadow Milk exhaled slowly, watching.

He tilted his head, eyes glimmering as he leaned closer — not in affection, not yet, but with an almost reverent hunger. Like an art thief staring at a relic thought lost to time.

He glanced back toward the water. The lifeboats. Flecks of firelight in the distance. Shouting. Splashing.

Irrelevant.

They had nothing to do with this moment.
This moment belonged to him.

He turned back to Pure Vanilla and, with slow confidence, wrapped his long, powerful tail around him — coiling him in deep black scales that shimmered faintly in the moonlight. Possessive. Protective. Claiming.

His claws, adorned in rings of bloodstone and pearls, traced along the length of Pure Vanilla’s arm and neck — not with desire, but with purpose. Searching.
For a mark.
A trace.
Any sign that someone had tried to claim this light before he did.

His frown deepened when he found nothing.

No binding rune. No coral-etched charm tucked beneath the collar.
No scent of another mer.

He looked at him again, and for the first time… smiled.

A slow, sharp smile. Beautiful and chilling.

“Untouched,” he murmured. “How lucky for me.”

He lowered himself beside him, their forms almost mirror-like on the rock — light and dark, warmth and chill, sunken star and trench-born void.

The waves lapped around them like an audience holding its breath.

Shadow Milk’s tail remained tightly looped around Pure Vanilla’s legs, possessive even in rest. He let one arm lazily fall across the other’s stomach, letting his claws rest gently against his ribs.

Already, names were forming in his mind.
Pet names. Titles. Curses and promises.
None of them fit. None were worthy. Yet.

“You’ll need a new name, won’t you?” he whispered. “Something prettier. Something that belongs to me.”

He chuckled softly. There was no rush.
He had all the time in the sea.

Maybe, if the little light made him happy…
If he was sweet enough, obedient enough — if he let himself be adored the way Shadow Milk wanted —

Maybe,he thought, I’ll carry his kin.

He reached out, gently brushing salt from Pure Vanilla’s lips with a fingertip.

“But first…”

“Survive.”

…………………………………………………...................................................