Reincarnated As Poseidon

The storm still raged above the endless ocean, its voice a chorus of thunder and shrieking wind. Yet beneath those crashing waves, Poseidon stood calm, his golden eyes fixed on the shifting currents around him. His hair floated like tendrils of living night, every strand alive with a faint silver glow.

The whispers had grown louder since the last battle — a low, echoing chant that curled around his thoughts like a predator circling its prey.

You are not just a god… You are the abyss itself.

He exhaled slowly, his breath dispersing into bubbles. No matter how far he swam, no matter how deep, the voice followed. It was Thalorin — the ancient water entity that had claimed his soul the moment he was reborn.

A ripple passed across the ocean floor, and in the distance, something vast moved. The sands shifted as if the sea itself were drawing breath. Poseidon narrowed his eyes, gripping his trident tightly.

"You're late," he muttered, his voice carrying oddly in the water.

From the darkness ahead, a monstrous form emerged. It was not entirely flesh nor entirely water — its body a fluid amalgamation of jagged coral, serpent-like scales, and molten blue light running like veins through its form.

Aegirion.

The newly crowned god of tides, drunk on his stolen power, his trident gleaming with cruel intent.

"You've grown," Poseidon said evenly, but his muscles tensed. "But you still reek of desperation."

Aegirion's voice was a rolling current, cold and mocking. "And you… still cling to a mortal's arrogance. Tell me, Poseidon, do you even know who you truly are?"

The currents swelled violently as Aegirion circled him. The ocean seemed to shrink, the water pressing in as if holding its breath for what was about to happen.

Poseidon tilted his head slightly. "I know enough. Enough to know you didn't come here to talk."

The water trembled.

Aegirion moved first. His trident slashed through the depths, sending a shockwave of water so dense it could crush a ship's hull. Poseidon deflected, the impact shaking his arm to the bone. The two gods spun in the water, exchanging strikes so fast the sea around them boiled from the force.

Each movement was a clash of ancient authority — the right to command the tides, the right to rule the ocean's endless kingdom.

"You've been whispering in their ears, haven't you?" Poseidon growled, blocking a strike that sent sand exploding from the seabed. "The other gods. Filling their heads with lies about me."

"Lies?" Aegirion's eyes glimmered like twin abysses. "When I tell them that you are not Poseidon at all? That you are Thalorin reborn? That the same monster they sealed away now wears a god's flesh?"

Poseidon's grip on his weapon tightened. The voice inside him chuckled darkly, as though enjoying the accusation.

The fight escalated. Poseidon thrust forward, his trident shattering a coral spire as Aegirion twisted aside. A whip of water lashed from Aegirion's free hand, wrapping around Poseidon's arm and dragging him toward a wall of jagged rocks. Poseidon spun with the momentum, driving his knee into Aegirion's side, the crack echoing through the water.

The sea churned violently now, a vortex forming around them. Schools of fish fled, and shadows deep below stirred restlessly.

"You can't run from it forever," Aegirion hissed, recovering quickly. "Every time you use your power, the abyss inside you grows. How long before Thalorin isn't a whisper in your head but the one moving your hands?"

The words struck like a harpoon to the chest, but Poseidon masked his reaction. "If I am Thalorin, then maybe that's what you should be afraid of."

Without warning, Poseidon extended his free hand. The water between them hardened into a spear of living current, driving into Aegirion's shoulder. The new god roared, twisting away, the wound leaking shimmering blue ichor into the sea.

The blood was a beacon.

Far below, the shadows answered.

The ocean floor cracked open, and tendrils of inky darkness surged upward, moving with hunger and purpose. They wrapped around Aegirion's legs before he could react, dragging him downward. His trident slashed through them, severing one after another, but more came.

Poseidon floated above, chest heaving. The voice inside him purred, Let me take over. I will end him for you.

He gritted his teeth. "No."

You can't kill him without me.

"I don't need you."

Then you will die.

The tendrils snapped toward Poseidon now, curling like serpents. He swung his trident, slicing through them, but they kept coming, each strike drawing more from his strength. The voice laughed again, low and cold.

Aegirion's eyes burned with fury as he broke free, rushing forward in a blur. His trident collided with Poseidon's chest, sending him spinning into the coral wall with bone-rattling force. Pain lanced through his ribs, and for a moment, his vision blurred.

"Look at you," Aegirion said, swimming closer. "Still pretending to be a god when you're nothing but a prison for something older and hungrier than the sea itself."

Poseidon's blood floated upward in dark ribbons. His lungs burned, his grip trembled — and still, that other presence coiled deeper inside him, eager, waiting.

He pushed himself upright, forcing a smile. "If that's true…" His voice was quiet, dangerous. "…then you're already standing too close."

The water around him suddenly dropped in temperature, frost forming on the tips of Aegirion's trident. From Poseidon's eyes, that faint silver glow flared into blinding light. The currents roared, the sea bending to his will in a way that felt almost too effortless… too alien.

The ocean itself became his weapon.

Water folded inward, trapping Aegirion in a crushing sphere. The pressure inside was enough to grind stone into dust. Aegirion screamed, the sound muffled by the depths, his body straining against the invisible force.

The voice purred in satisfaction. Yes… that's it. Give me more.

But just before the sphere could collapse completely, Poseidon pulled back, letting the water explode outward. Aegirion tumbled away, coughing blood, eyes wide with something Poseidon had rarely seen in him — fear.

"This isn't over," Aegirion rasped, retreating into the shadows of the deep.

Poseidon hovered alone, chest heaving. The sea was quiet again, but the silence felt wrong, like the pause between a heartbeat and a blade.

You should have killed him, the voice whispered, disappointed.

Poseidon closed his eyes. "One war at a time."

Far above, the storm began to break, sunlight piercing the surface in fractured beams. But deep below, in the cold where no light reached, something vast and ancient stirred — and smiled.