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For Fate’s Sake: Children of the Broken Oath

Summary:

For Fate’s sake, Poseidon brooded, even the sea cannot wash away the weight of promises broken.

From the womb of a mortal beloved, three children had drawn breath—Lelex, storm-eyed and solemn; Psyche, a soul once scattered through myth; and Perseus, his ocean-born heart already echoing with war drums. A son and two daughters—tides braided by the hands of gods and defiance. And the Fates, ever watchful, had already begun to measure thread.

i am terrible at summeries
credit given to Triplet of the seas
read og first

Notes:

hi!!!!
i hope u like this.
Dear og author if you are reading this,
I just wanted to tell you that this will have its own plot which is completely different. I hope you are ok of me using your story for inspo. If not I can take it down

(See the end of the work for more notes.)

Chapter Text

Zagreus, son of Hades and the ultimate rebel prince, padded barefoot through the grass. His celestial bronze crown wasn’t your average kingly circlet—
It looked more like a thorny wreath grown wild by mischievous gods, twisting and curling like a vine with attitude. Black curls framed his face like flames
flickering against the twilight. In his right hand, he carried a sickle made of stygian steel (because regular steel was too boring), and in his left, a wineskin sealed with funereal wax—full to the brim with Lethe water, the only drink guaranteed to wipe your memories cleaner than Hermes’s fastest sandals.

Trailing behind him were two souls recently freed from the mortal coil.
The first was Icarus of Crete, his sun-kissed limbs restless beneath an amused, wary gaze. The other was Crocus of Sparta, tight and taut as a lyre string, his sea-green eyes sharp enough to slice through ambrosia cake.

Crocus cocked his head and narrowed his eyes at Icarus. “You know, your face is uncannily like Hyacinthus’s. But I was at his funeral in Sparta. You died somewhere else, and yet here you are.”

Icarus gave a wry smile, rubbing the ghostly bruises below his collarbone. “I am the new Hyacinthus, the reboot edition, as Zagreus calls me. If anyone understands soul recycling, it’s the god of rebirth himself. You could say Apollo’s love comes with a lifetime warranty.”
Zagreus grinned, showing a hint of dimpled mischief. “Souls aren’t like olives—one bite and done. They’re more like those annoying hydras; cut one off, and another sprouts. Same color, same shape, just with a fresh lease on life.”

Crocus frowned. “Hydras are terrifying.”

Icarus laughed. “You ain’t kidding.”

They moved through the orchards until the alabaster arch of Elysium’s boundary rose before them. Beyond lay the shadowy hinterlands, where rivers murmured secrets in the dark and stalactites dripped ancient time.
“Zagreus,” Icarus’s voice softened, “my son Alexios—he’s too young to die. Can you bring him back?”

Zagreus halted under a rock vein flickering with ghostly light. “I will guide him swiftly. Near you, as close as blood and fate can weave. He will be yours again.”

Icarus’s eyes glistened. “Thank you.”

 

Just then, a chill gust blew in, carrying the scent of icy waters and grudges older than Olympus. From the shadows stepped a figure tall and thin, draped in robes darker than a cave without a torch. Her hair was a torrent of frozen iron, her eyes cold as Hecate’s moonlit stare. It was Styx—the goddess of the river bearing her name, eternal judge and fierce oathkeeper.

Zagreus stiffened and placed his sickle between the souls and the goddess. “Lady Styx. This far from your riverbank? Lost your way, or hunting trouble?”

Styx’s smile cracked like brittle ice. “Neither. I bargain.”

She revealed a third soul crouched behind her skirts—a pale woman, slender and regal: Psyche. Once a princess, once a goddess-dream, now a shadow of longing and loss.

Icarus blinked. “Psyche? The poets sing you immortal, wandering Olympus with your winged husband and your daughter Hedone!”

Psyche’s lips twitched sadly. “Poets are terrible storytellers. I died the moment I opened that cursed box. No immortal bliss for me—just an eternity of regret.”

Crocus raised a brow. “Wait… you died opening a box? Sounds like Pandora’s cousin.”

Zagreus chuckled. “A cosmic soap opera, indeed.”

 

Styx’s gaze flicked to Zagreus. “I come with a proposition. Your father’s court is distracted, busy punishing Zeus’s forbidden daughter for his mortal dalliance.

So I escort this soul as part of my price.”

Zagreus narrowed his eyes. “Explain.”

Styx stepped aside, revealing a faint glow beneath her shadow. “I want these three reborn—Hyacinthus-Icarus, Crocus, and Psyche—as triplets in a womb already carrying a god’s seed.”

Crocus’s eyes narrowed. “Which god?”

“Poseidon,” Styx hissed, savoring the name like bitter wine. “He dared break his oath to me and sire again. My punishment? To watch his brood chased by relentless suitors.”

Icarus snorted. “Who? You mean Apollo, Hermes, and Eros all still have a thing for us?”

Styx smiled cruelly. “Exactly. Apollo with his tragic songs, Eros with arrows sharp enough to wound even gods, and Hermes—the ultimate annoying stalker of mortals.”

Crocus flushed, trying not to smirk. “Hermes is still pining? For me?”

Styx nodded. “He’s been pestering Zagreus for centuries, even threatening to blackmail him. You two owe me a favor, by the way.”

Zagreus rolled his eyes. “Don’t ask.”

Psyche hugged herself tighter. “And Eros?”

“Half-mad with grief, since your death. Your daughter is his anchor, but without you, love itself feels broken. He hopes you’ll accept his courtship again in this new life.”

Psyche sighed. “I always did hate opening boxes.”

Icarus turned to Zagreus. “What’s the catch?”

Styx’s eyes gleamed. “I exact vengeance on Poseidon for breaking our oath. Your rebirth is my weapon.”

Zagreus tapped his sickle impatiently. “And if we refuse?”

Styx’s voice dropped to a threat. “I send Psyche back to Elysium, and the others to Hades’s ledger. Your father may be merciful, but bureaucracy is merciless.”

Icarus and Crocus exchanged looks and nodded.
“We accept.”

 

Psyche, hesitant but resolute, echoed, “Please.”

Zagreus sighed. “Very well. But any harm that befalls you in the mortal world will be on her head.”

Styx nodded regally.

Zagreus sighed heavily again and turned toward them and said, "We must wait in Hades palace until Charon has left. Follow me”

 

Inside the shadowed halls of Hades’ palace, where the air smelled faintly of brimstone and forgotten secrets, a circle of mismatched chairs surrounded a smoldering obsidian brazier. The flickering blue flames cast ghostly shadows on the stone walls etched with ancient runes. This was not your typical Olympian hangout.

Zagreus sat slouched in a throne-like chair, his stygian steel sickle resting lazily across his knees, looking every bit like a bored prince of the Underworld.

Icarus, still sporting singed wings that looked like burnt parchment, squinted around the gloomy chamber. “So... this is where the immortals come when they’re, like, totally over being immortal?”

Crocus adjusted his Spartan cloak, the sharp lines of his jaw set. “Seems so. Last time Hera showed up here, she was fuming over Zeus’s latest affair.
Apparently, even the queen of Olympus needs a timeout in the Underworld sometimes.”

Psyche let out a weary sigh. “You think that’s bad? Try eternal longing and getting ghosted by a love god who thinks ‘no’ means ‘try harder.’”
Zagreus shot her a wry look. “Sounds familiar.”

 

Just then, the heavy doors slammed open, echoing through the cavernous hall. Styx, the grim but efficient spirit of the river, floated in wearing a judge’s robe stitched with flickering ghostly light. In her skeletal hands was a stack of glowing scrolls thick enough to weigh down the River Lethe itself.

“Apologies for the delay,” Styx said, voice as cold and sharp as the river she ruled. “I brought the paperwork. Reincarnation contracts, binding oaths, and the
latest ‘no meddling’ clauses.”

Icarus groaned, flopping back in his chair. “Ugh. Bureaucracy. Even death has paperwork?”

Crocus smirked. “Underworld bureaucracy: a whole new level of torment.”

Psyche rolled her eyes. “I thought I was done with torment.”

 

Zagreus flicked his sickle lazily. “We’ve got fresh souls to reboot. Icarus, Crocus, Psyche—you’re next up for reincarnation. One last shot at mortal life.”
Icarus perked up, hopeful. “Really? Mythology 2.0?”
Crocus crossed his arms. “With better endings, hopefully.”
Psyche muttered, “And maybe fewer heartbreaks.”

 

Suddenly, from the shadows near the entrance, a figure darted in—Alexios, wearing a slightly confused expression and covered in dust. “Uh... hey, sorry I’m late. Wait, what is this? A support group? For the dead? And you guys are... reincarnation candidates?”
Zagreus raised an eyebrow. “That’s the gist.”

Alexios glanced around nervously. “Right. So... can I—uh—join? I’ve got some unfinished business upstairs.”

 

Before anyone could answer, a deep, icy voice rumbled through the hall.
“Well, well, well... what have we here?”
The shadows thickened, and the imposing figure of Hades appeared in the doorway, his eyes glowing faintly like dying stars.
“Alexios, sneaking into the Underworld palace without an invitation? And you lot plotting some kind of rebellion with reincarnations? You’re lucky I’m feeling generous.”
Icarus stammered, “Uh, your lordship, we were just—”

 

Hades held up a hand, silencing him with a glare that could freeze rivers.
“Save it. But since you’re here, maybe you can help me decide—should I revoke all your reincarnations, or let you test fate one more time?”
Zagreus smirked, standing up. “Come on, Dad, don’t be like that. We all deserve a second shot—even if it’s in the Underworld.”
Hades’s lips curled into a rare, amused smile. “Fine. But I’m watching you. One false move, and you’re back in the River Styx—this time with extra paperwork.”
Alexios relaxed and grinned. “Sounds like a plan. Now, where’s the coffee in this place? I could use a drink before my next life.”
Hades’s massive doors slammed shut behind him with a low rumble, leaving the group alone in the flickering dim light of the Underworld. They all exhaled, a mix of relief and nervous energy filling the air.
“Alright,” Zagreus said, stepping forward with a smirk. “Now that Dad’s feeling generous, it’s time to get you all sorted. Who’s ready to roll the dice on life again?”
Alexios grinned. “I’m in. But seriously—where is the coffee around here? I don’t think I can start a new life without caffeine.”

Icarus chuckled, shaking his head. “Maybe the River Lethe does the job. Erases your memory and your will to function before noon.”
Psyche glanced around nervously. “So… this reincarnation thing—how do we actually do it? Do we just jump into some river or something?”
“Exactly that,” Zagreus replied, leading them toward the glowing, misty edge of the River Lethe. The surface shimmered like liquid moonlight. “One dip, and poof—you forget everything. Clean slate, new life, no more Underworld drama.”
Crocus frowned skeptically. “And if we mess up again?”
Zagreus’s smirk deepened. “Then you come back here and face Dad’s extra paperwork. Nobody wants that.”
He stepped into the river, the mist curling around him until he vanished. As the last ripples faded, Hades’s voice echoed faintly behind them: “Remember—one false move, and the paperwork will get worse.”

 

The last echoes of Hades’s voice faded into the shadowy halls as the group’s forms vanished one by one into the River Lethe. Zagreus lingered for a moment, watching the shimmering surface settle back to its eerie calm.
He ran a hand through his dark hair and grinned. “Well, that went better than I expected.”
From a side chamber, a soft, amused voice called out. “Better for you, maybe.”
Zagreus turned to see Hades stepping back into the room, his expression half-smile, half-glare. “You think this is a game? These souls aren’t just pieces on a board.”

 

“Relax, Dad,” Zagreus replied, leaning casually against the marble pillar. “They get a second chance. What’s so wrong with that?”
Hades crossed his arms, eyes glinting. “Because second chances can turn into third, fourth, fifth… and then we’re stuck babysitting eternal screw-ups.”
Zagreus laughed. “Sounds like someone needs a hobby. Maybe knitting?”
Hades’s lips twitched in reluctant amusement. “If I had time for hobbies, I wouldn’t be the Lord of the Dead.”
Suddenly, a flicker of movement caught Zagreus’s eye. The faint outline of a new soul appeared near the riverbank—the last of the group, Alexios, stepping hesitantly from the mist.

“Well, look who’s back,” Zagreus said with a smirk. “Ready to try round two?”
Alexios wiped water from his brow, his trademark grin returning. “I don’t know if I’m ready, but hey—if Hades says I get one more shot, who am I to argue?”
Hades’s shadow loomed behind them both. “One rule. No more rebellions. No more sneaking into my palace uninvited.”
Alexios chuckled. “Deal. Though, I can’t promise I won’t find other ways to keep things interesting.”
Zagreus clapped him on the shoulder. “That’s the spirit. Now go on—make this life count.”
With a final nod, Alexios stepped fully into the River Lethe, the silvery mist curling around him until he disappeared once more.
Hades shook his head, muttering, “Idiots. All of them.”
Zagreus just smiled. “Yeah, but our idiots.”

 

Far beneath the tides where the ocean bed trembled with ancient secrets, Poseidon stood on the terrace of his coral-bastioned palace, staring into darkness lit only by bioluminescent ghosts of fish. His hand rested loosely on the trident strapped to his back, but his thoughts drifted far from war or dominion.
Three heartbeats pulsed through him.
He had felt them from the moment they drew their first mortal breath, curled together in that cabin in Montauk—a rhythm like surf, steady and inseparable.

 

Three. He had expected one child. Perhaps two. But three? The Fates had played a deeper game.
A son: Lelex, born second, eyes already wise, gaze steady as stone. A king’s name, passed from an age before myths had poets. Then Percy, firstborn by mere minutes, fierce and fast even in sleep, kicking with the tides of storms not yet dreamed. And last, Psyche, smallest of the trio, quiet but deep as the trench, her spirit already ancient with longing.
Two daughters and a son. One mortal mother. And Poseidon—god of the sea, oath-bound husband to Amphitrite, breaker of that oath once again.
He closed his eyes, feeling the weight of his own heartbeat echoing theirs, multiplied. The ocean whispered their names in seaweed scrolls and shell murmur. Percy. Lelex. Psyche.
Demigods were not meant to be born like this—together, braided at birth, bound by something older than ichor. They were meant to be scattered, divided by time and nation, sired in loneliness and hidden until prophecy dragged them screaming into war.
But not these three.
They had arrived like a tide refusing to obey the moon.
Sally had greeted him with her usual unimpressed stare, robe half-buttoned, cradle beside her full to bursting with newborns.
“You could’ve mentioned there’d be three,” she said, voice hoarse but amused. “I’m a writer, not a hydra.”
He had stared down at the infants in stunned reverence. Percy had gripped his finger. Lelex had blinked up at him like a miniature judge. And Psyche… she had not cried. Not once. Just looked at him as if she knew.
As if she remembered.
He hadn’t told Sally what he suspected—not fully. He hadn’t told her how the name Psyche sent cracks down the walls of Olympus, or how Lelex’s soul shimmered with a Spartan gravity far older than the child’s body. He hadn’t dared.
And now? Now the sea churned with what was coming.

Hera would rage. Zeus would question. Hades would sneer. Athena would watch too closely.
But Poseidon had already decided.
Let them come.
The sea had a son who remembered honor. And two daughters who remembered everything.
He placed a hand on the salt-slick balcony rail, eyes fixed on the depths. “You’ll try to take them,” he murmured, to the gods, to fate, to the whispering dark. “But they are mine. They are Sally’s. And they are each other’s.”
He said their names aloud, binding them like an oath. “Percy. Lelex. Psyche.”
The currents stilled, listening.
He smiled, bittersweet and cold. “Let Olympus howl. My children are not chess pieces. They are the storm.”
And beneath him, the ocean whispered in agreement.