My Charity System made me too OP

Leon drew his blade again—Heartpiercer, the soul-bound weapon humming with anticipation. As the first siren dove in, her song twisting into a tangible lance of madness, he dashed forward with a single step, the coral beneath his boots exploding from the force.

A shockwave of water and golden light erupted as his sword cleaved through the song itself, severing the psychic melody before it could reach the others. His blade then met the dragon's snout—divine steel meeting abyssal scale.

The clash sent ripples through the water, the dragon screeching in fury as it twisted away, only to be met by Roselia, who launched a flaming spear at its exposed flank. The flames didn't burn the water—they boiled it, creating a vacuum tunnel that rocketed the spear directly into the creature's side, exploding on contact.

"One down," she muttered.

Millim, eyes blazing with red energy, leapt from her platform, her Blood Knights flanking her mid-air like crimson comets. With a flick of her hand, her twin axes appeared—etched with ancient blood runes, forged in war.

She met two sirens head-on in a brutal dance of steel and scream. The water twisted with every swing of her blades, painting trails of red and black.

Naval took the high ground—literally—jumping to a crystalline coral arch that arched over the battlefield. With a surge of lightning magic, he hurled his halberd downward, embedding it in the back of a sea-dragon with a concussive boom that cracked its spine. Electricity rippled outward, chaining to the nearby siren and shocking her song into silence.

"Three left!" Roman called out, finally recovering from the earlier mental strike. He planted both feet, drew his twin sabers, and launched into the fray—his fighting style a hybrid of speed and momentum. He slid under a dragon's bite, cut through a siren's leg, and vanished into a blur before reappearing mid-spin above another.

Liliana stood still amid the chaos, focusing. Her staff was planted into the reef beneath her, glowing sea-green runes spiraling up her arms. "Seal: Memory Chain Bind!"

Runes exploded from the tip of her staff like a net of luminous vines, targeting one of the remaining sirens. The siren shrieked, struggling as the runes wrapped around her body and mind, locking her in a stasis of repeating thoughts.

It screamed and thrashed, but couldn't escape the loop.

Leon moved toward it, eyes narrowed. "No mercy."

A single thrust through the heart—another enemy down.

Then—the Rift shook again.

Deep below, the eye reopened fully. A wave of thoughts—not words—slammed into them all.

A memory not their own.

A throne beneath the waves.

A sea god betrayed by its worshippers.

A mind shattered, not by time, but by grief.

A promise to drown the world above.

Leon staggered, barely holding his footing. "That wasn't just a vision… it was a piece of its soul."

Millim landed beside him, blood-splattered and grinning. "That all you got, big guy?"

But Leon wasn't smiling anymore. "No. That was just the greeting."

The glowing waters far below began to spiral, revealing a chasm—a spiral trench leading to the Abyss Core.

And from its depths, something began to rise.

A massive, crusted crown formed from coral and bone.

Eyes—too many eyes—glimmered along the sides of a titanic, serpentine being.

The Sovereign of the Abyssal Mind had awakened.

And it was coming.

"Everyone—formation Delta!" Leon barked. "We hold this reef and prepare for hell!"

From above, the Rift sky began to crack—twilight bleeding into deep-space blue.

This was no longer a dungeon.

It was a war of wills.

And only those with minds of steel would survive.

The reef became a battlefield suspended between two realities—thought and matter, sea and sky. The Mind Typhoon Sea Rift was alive, and it was no longer testing them—it was consuming them.

The Reef trembled violently as the Sovereign of the Abyssal Mind rose, its endless coils splitting the depths with mind-bending majesty. Its body was an impossible amalgamation of deep-sea leviathan, ancient sea god, and something wrong—a being that had stared into the abyss and devoured it. Reality warped in waves around it; the water trembled like glass on the verge of shattering.

[Abyssal Sovereign: HP—???]

Status: Mind Unchained. Will Projection: Tier VI+.

Traits: Immune to Fear. Immune to Mental Damage. Immune to Control. Passive Madness Field: Active.

Leon steadied his stance atop the glowing coral platform, sword humming in harmony with his aura. "It's coming in full," he muttered. "Everyone, anchor your minds. No doubts. No fear. We fight together."

"Delta formation—engage!" Roselia barked. "Blood Knights, shield wall!"

Millim's knights slammed their polearms into the coral and formed a semicircle, their blood auras forming a crimson dome that shimmered against the growing psychic storm. Millim, fangs bared and eyes glowing, stood at the front—arms outstretched, crimson energy twisting around her like a vortex.

Naval raised his halberd high and slammed it down, calling lightning to weave a conductive aura over the group. "Resistance grid active! Liliana, run mental reinforcement spells!"

"Already on it," Liliana whispered, her runes flaring brighter. "Cognition Stabilizer—Chain-Link Harmony!"

White and turquoise energy spread from her staff, enveloping the party in synchronized mana waves, each pulse reinforcing their mental resilience. The whispers—so sweet, so dangerous—dulled to white noise.

Then the Sovereign struck.

From the darkness below, its tendrils shot upward—each one the size of a tree trunk, encrusted with cursed coral and pulsing with eldritch runes. They slammed into the reef, detonating coral platforms and hurling chunks of terrain into the void.

Leon blurred forward, slicing a tendril in half, golden light trailing from his blade like a comet. The severed flesh writhed, screamed, and regrew instantly.

"Regeneration rate: absurd," he growled. "Target the thought-nodes—those glowing clusters behind the eyes!"

"Way ahead of you!" Millim yelled, vaulting onto a tendril with a savage grin. Her axes struck in tandem—first disrupting the sovereign's outer flesh, then the core beneath. Blood sprayed like black ink, and the creature shrieked—not in pain, but defiance.

Sirens returned in force, this time with heavier units—Mind-Reavers riding abyssal mantas, each one armed with psychic glaives.