In Baldur's Gate 3 With a Multiversal Gacha System?

...

They were no longer in the Hells.

Stars stretched in every direction. The Astral Plane.

Then the ship lurched.

The floor tilted, and everyone was suddenly weightless. Then falling. Forward. Sideways. Every direction. Gravity itself became a guessing game.

Lae'zel slammed against a wall, cursing in sharp, guttural gith. Shadowheart cried out as she lost her grip and tumbled over the fleshy plating. Even Us screeched as its claws scrambled for traction.

But Fin?

Fin laughed.

The wind from a hundred directions tore at his tattered robe, and he spread his arms like wings.

"Ohhh god," he breathed. "Is this what flying feels like?!"

His eyes gleamed with euphoric madness. His feet slid along the slick metal, his body riding the curve of the falling ship like a wave. Debris and hellish sparks danced around him. And still, he laughed.

Shadowheart, holding fast to a broken rail, shouted, "You're insane! The ship's tearing itself apart!"

Fin caught sight of her spinning past and moved.

He glided effortlessly across the floor, catching her by the waist mid-fall.

"That makes two of us," he said with a grin. Then he leaned in, their faces close enough to feel each other's breath. "You look good with your hair blown back."

Shadowheart blinked at him, unamused.

Then gravity flipped again.

Her fingers clawed for purchase, missed. She found herself wrapped tighter in Fin's arms.

Fin then lowered her back to the floor. Her cheeks were flushed. Whether from fury or something else, she didn't say.

Fin raised both hands innocently. "No complaints about the save."

But something shifted.

He looked at the console, tentacles twitching violently now. A thick, black fluid leaked between their joints. The light was no longer pulsing. It was flickering.

The whole ship groaned.

Fin's smile dulled slightly. "Shit. That's not good."

Lae'zel's voice rang out from behind, furious. "What have you done?! The ship's is unstable!"

Ali flickered into view beside him, crouched low in her hard-light body. Her voice was tight.

"The tether's unravelling. You've got twenty seconds to re-anchor us or we're going to be spacedust."

Fin was already moving, sliding to the console and grabbing the pulsing, dying tentacles with both hands.

"Everyone hold onto something!"

CRACK

The world buckled again.

This time, it wasn't the same neat, violent rip as before.

It collapsed inward.

Folded.

Then snapped.

A deep, gut-wrenching boom signalled their return to the Material Plane.

...

Somewhere within a large, dense forest, a young female teifling is seen peering through a telescope on a clear night. That was until a booming cracking rang out, and a flaming nautiloid raged through the air. 

Elsewhere, a large orange Hobgoblin is beside a female drow as they see the nautiloid fall through the air atop a guard tower of some kind. Seeing the flaming nautiloid brings a smile to the drow's face. 

"Goblins! Go. Go and search!" the drow yelled with malice. 

We can see a massive group of goblins emerge as they rush towards the nautiloid, drums booming as goblins' yells permeate the night. 

Back on a nautiloid, another huge explosion erupts, causing Fin to get sent flying to an opening as he is knocked around. He lands beside an injured Mind Flayer, who gives him a neutral look.

The ship pitched hard.

Metal groaned, the hull flexing under the pressure as another burst of flame erupted from the left side as the nose of the Nautiloid tilted downward in a sickening lurch.

Lae'zel lost her grip.

"Ghh—!" she snarled, fingers clawing at the slippery pipe—

But it was too late.

She slipped.

Her body tumbled backward, caught in the rising wind and spiralling debris and slammed directly into Shadowheart.

The cleric gasped as the impact knocked the breath from her lungs. "What-?!"

Then both women went tumbling.

Out of the gaping rupture in the helm's side.

Wind howled. Metal screamed.

Lae'zel and Shadowheart spun out into the open air, their bodies flailing, eyes wide, faces lit by the burning wreckage above them. Their screams were lost to the roar of the plummeting ship.

Fin didn't even turn around.

His grin faded slightly, eyes narrowing as the console pulsed beneath his fingers.

Ali blinked into his periphery, expression unreadable.

"…They're gone," she said quietly.

Fin's voice was a low hum, more focused than distraught.

"I'll find them," he murmured.

The wind howled through the broken helm, tearing at what was left of the consoles. Flame bloomed behind him as systems ruptured, piping burst, and sparks danced across the shattered walls.

Fin stood still for a heartbeat.

One.

Two.

Then his eyes drifted sideways—

—to the injured mind flayer still slumped near the helm, its limbs twitching, face spasming under pulsing strain. Ichor leaked from its wounds. Its gaze locked with his.

They stared at each other.

Fin tilted his head.

"...Nah."

He turned.

"Fuck it."

And yeeted himself out of the side of the ship.

One smooth sprint and a leap into the roaring sky, body twisting as he dove headfirst out of the Nautiloid, plummeting towards the ground.

Wind screamed.

Fin plummeted.

The broken sky spun above him—trails of smoke, flame, and metal debris hurtling in every direction. Chunks of Nautiloid plating spun past, each the size of a wagon. His tattered black robe flared out like wings behind him, his body a black streak falling through chaos.

A massive slab of flesh-metal tumbled toward him.

His eyes flicked once. No panic.

His hand swept upward lazily.

"Dismantle."

Schhhhrip!

The debris cleaved in half mid-fall, two halves spiralling past him like obedient halves of a door.

Another chunk fell into view. Then another. Slice after slice, clean as a chef through the meat. Burning panels. Bone-ribbed walls. Screaming imp corpses still aflame—

All gone in an instant, parted by precise, cursed strokes as he fell.

Ali's hologram flickered into view beside him, its intensity fluctuating with the wind speed.

"You do realise this is not a flight technique, right? What's the plan here?!"

Fin didn't answer.

His eyes scanned the sky, turning below him, nothing. No sight of Lae'zel. No flash of Shadowheart's armour. Only smoke and falling wreckage.

Ali leaned in closer, annoyed. "Fin. Plan? There is no ground cushion, no spell in the queue...are you listening?!"

He exhaled slowly. "It's fine."

"It is not fine—!"

He held up five fingers.

"Five…"

"Are you counting?!"

"Four."

"Fin—!"

"Three…"

Ali started blinking in panic, glitching. "Oh my god oh my god—"

"Two."

"Do not splat. I swear—!"

"One."

Below him: the ground.

Close.

Very, very close.

And then—

WHUMMM

A sudden burst of blue-purple light bloomed beneath him.

Psionic energy.

It caught Fin mid-air, keeping him suspended upside down like a ragdoll in the grasp of an invisible hand. Every part of him was frozen, hair dangling toward the ground, robe fluttering around his face.

"…Huh," he said, blinking.

Ali floated beside him, staring. "Well I'll be damned."

Fin smirked sideways, smug despite dangling like laundry.

"See?" he said. "Relax."

And then—

thwip—

The psionic stasis vanished.

Fin dropped like a rock.

"Wh—WAITWAITWAIT—"

THUD

His head hit the dirt first, followed by his knees, elbows, and finally his pride.

"OW—damn it!" he groaned, voice muffled against the grass. "Why head-first?!"

Ali landed gently beside him, arms crossed, lips twitching with suppressed laughter.

"Maybe next time, have a plan."

Fin rolled onto his back, staring at the sky with one eye squinted.

"I did have a plan…" he mumbled. "Step one: don't die. Step two: get to the helm. Step three… improvise."

Ali snorted. "You're lucky step four wasn't flat skull."

Fin barely had time to groan before—

BOOOOOOM.

The sky lit up behind him.

A thunderous crack split the early morning air as what remained of the Nautiloid slammed into the coastline in a fiery crescendo of smoke, metal, and shattered demonflesh. A flaming section of the hull skidded across the beach in the distance, spraying sparks and throwing up a wall of sand and seawater.

The shockwave hit a second later, rattling the trees and sending a fine spray of warm sand cascading over Fin's half-buried body.

He groaned again and sat up.

"Ugh. That sounded expensive."

He shook the sand out of his long hair with a few rough swipes, brushing it from his face and robe. His nose flared with an indignant puff that kicked away the clinging grit.

Then he stood.

The surroundings were… peaceful.

Broken trees. Crushed undergrowth. A few small fires in the distance. The beach stretched out to the east, the surf gentle and warm against the horror that had just unfolded. Beyond the treeline, a hill sloped downward into unfamiliar terrain.

He turned a slow circle.

This wasn't the starting position from the game.

He was definitely in the Sword Coast, but that Nautiloid was behind him. At this point, he was just in a forest, a shattered trail of burning metal, and the distant glow of Avernus-light reflecting off the sea.

Fin narrowed his eyes.

"Guess I didn't stick the landing that well…"

Behind the treetops, the horizon was beginning to glow. Dawn. Soft orange light bled across the waves.

Fin stilled.

He raised a hand slowly, fingers stretching into the warm light as it crept over the coastline.

The first sunlight he had felt in twenty years.

It kissed his skin, it was gentle.

Warmth bloomed across his knuckles, trailed along his wrist. He stared at the light on his palm like it was something sacred.

His breath caught.

A single tear welled in his eye. It slipped halfway down his cheek before he quickly wiped it away with the back of his wrist.

Ali flickered into view beside him, voice quieter this time.

"…Twenty years underground," she said. "I thought it might hit you harder."

Fin gave a small smile, still staring at the rising sun.

"It did."

Then—

DING!

A subtle chime echoed in his ears as translucent text flickered to life in front of his vision:

[NAUTILOID ESCAPE COMPLETE]

+500 PP 

Fin blinked.

"Not bad."

He cracked his neck once and let out a long breath. "I'll take it."

Then he tilted his head.

"Ali," he called, tone more serious now. "Talk to me."

"…You want to talk now? After launching yourself off a crashing ship, slicing through junk like a madman, nearly face-planting into the sand and—oh yeah—laughing the whole time?"

Fin gave her a grin. "Well, yeah. That black flash was like a high, I really couldn't tell anymore"

Ali's eye twitched.

Fin had already turned away, kicking sand off his feet as he began walking toward the distant plume of smoke rising from the Nautiloid crash site.

His pace wasn't rushed. The soft crunch of his bare feet against the sand trailed behind him as waves lapped lazily at the shore.

He opened his System with a mental flick.

The familiar interface unfolded across his vision in blue-gold panes, organised neatly by category.

Fin tapped open the [Path of the Jujutsu Sorcerer].

Dozens of skill nodes, abilities, and expansion trees shimmered across the screen. Cursed Techniques. Energy Manipulation. Domain Constructs. Reverse Cursed Techniques. It was all there. But his brows furrowed.

He remembered something.

In Baldur's Gate 3, having a clean, streamlined build was everything. Specialised characters were strong. Synergy mattered. Constantly picking from different trees and slapping together random power sets might look cool, but it wouldn't make you effective.

He should be going all in.

Fin exhaled slowly.

"Alright," he muttered. "No more fancy tricks. Jujutsu or nothing."

Ali floated beside him, her posture shifting as she noticed the seriousness in his tone. "You're locking in?"

He nodded. "Too much overlap makes you clumsy. I've already got Flash-step, some Haki, and cursed energy movement. Now it's time to master what I've got.

His eyes narrowed slightly as the wind picked up, brushing strands of hair across his face.

"The System charges 1500 PP per skill node," he said quietly. "Way above what I've got now. Doesn't mean I can't learn it manually."

Ali hummed. "Training, huh?"

"Yeah. Learning RCT is priority one. I may have a cleric to help me, but I can't solely rely on them. And then there's Shrine, I need to practice and grow its strength via my own training and not solely through the rolls if I wanna speed up the process...unless-" 

A thought struck Fin's head.

Fin stopped walking. His eyes widened a fraction.

Ali noticed immediately. "What is it?"

He didn't answer.

"Haha, I can't be solely on the system, I'm a Jujutsu Sorcerer now!" Fin exclaimed. 

"Are you still high?" Ali mumbled. 

Ali floated closer, watching his face tighten into something halfway between fascination and recognition.

"You found something," she said.

Fin didn't move.

He just whispered the words.

"…This is it." He smiled, closing his eyes

...

[Mindscape – Inner Domain]

He stood in a boundless, dark space.

The floor was a shifting plane of still, dark water. Black glass. A faint reflection of the stars above shimmered with each movement.

In front of him… stood himself.

A mirror image.

Same eyes. Same face. The Fin's approached each other without hesitation.

They raised their hands at the same time.

And grasped each other.

Chains exploded out of the void, clattering across their arms and shoulders, sliding over their joined hands like iron serpents. They locked into place with a deep, echoing clang.

The deal was made.

...

Binding Vows.

In the world of jujutsu sorcery, to reach true strength, sorcerers forge Binding Vows—rules, self-imposed contracts made with themselves or others.

The stricter the vow, the higher the reward.

Risk equals strength.

Limit your cursed energy? It grows stronger in return. Reveal your secrets to the enemy? Your technique hits harder. For jujutsu sorcerers, discipline is power and power always demands a price. 

Back in reality, Fin opened his eyes.

A soft chime echoed.

[Binding Vows Have Taken Effect]

A deep breath escaped him. The morning sun brushed across his face. He didn't blink.

Ali hovered nearby, watching him with narrowed eyes. "You did something. What was it?"

Fin flexed his fingers once. The cursed energy shimmered faintly beneath the skin.

"I made two vows," he said, voice quiet but certain.

He turned slightly toward her. "The first one's standard. By revealing how my skills work every time I use them in a real fight, my overall power will increase!"

She looked sceptical but didn't interrupt.

Fin's eyes darkened as he pulled open his System menu again.

"The second one's mine," he said. "I permanently cut my total PP gain from all sources in half. Until the end of Act 1."

Ali's projection stiffened.

"...You what?"

He nodded.

"In exchange… I gain this—"

He swiped his hand through the air, opening the [Path of the Jujutsu Sorcerer] tab again.

But this time, it looked different.

The usual web of skill nodes, glowing in that soft blue hue, was gone.

In its place:

A small obsidian cube rotated slowly in the centre of the display. Purple and black threads pulsed through it like veins, cursed energy coiling inside with deliberate precision. Beneath it, one line of text pulsed:

[Jujutsu Mini Gacha – Binding Vow Variant]

Cost per Roll: 250 PP

Path Exclusive: Locked to Jujutsu Sorcerer.

Ali blinked. "Wait… what is that?"

Fin gave a small smirk.

"I turned the path into its own mini gacha," he said. "The entire node system's been replaced for the time being."

She squinted at the cube as it spun, quietly menacing.

"You locked yourself in," she said.

"Yeah," he nodded. "No more half-steps. No pirate skills, no borrowed magic. Every reward I get now is purely from the Jujutsu Sorcerer path. Locked in."

Ali hovered closer, inspecting the cube. "And the cost?"

He smiled.

"Dropped from fifteen hundred… to two hundred fifty."

Her eyes widened. "That's… absurd."

Fin nodded. "It is. But I paid for it."

Ali's voice dropped slightly. "You cut your entire PP gain by half, which makes it harder to get other rolls from elsewhere aside from JJK. JJK isn't exactly the strongest world out there, you know"

"Well, it's more than enough for the time being, just till the end of Act 1, and from that point I can work something out to grow even stronger!"

He looked back at the spinning gacha cube. His reflection shimmered off its surface, older yet unwavering.

"Everything I am from this point on… is going into that path."

Ali watched him in silence. Then, slowly, she gave a small nod.

"Well," she said, "you'd better start rolling."

[Path of the Jujutsu Sorcerer – Mini Gacha Mode]

Gone were the old nodes and webbed branches. In their place: a black-and-purple box, slowly rotating in the void of the UI.

At its centre: one large button.

[Roll – 250 PP]

Fin glanced at his current total.

[PP Total: 517PP]

He exhaled slowly.

"Alright," he whispered. "Let's see what this gets me."

His finger tapped the Roll button.

WHMMM…

The cube pulsed, rotating faster as purple streaks of cursed energy crackled across its edges.

Then...

DING!

[You have rolled - Gojo's Haori - Uncommon]

"A haori worn by the legendary sorcerer Gojo Satoru. Not only does it offer immense comfort and battle fluidity, but wearing it subtly aligns your cursed energy output for maximum stability. Minor boost to cursed energy control and midair movement."

A soft light shimmered into existence at his side. A folded bundle of crisp, ceremonial white cloth with black accents floated just beside him, then zipped into his inventory with a faint chime.

Fin shrugged

"That's clean, I guess"

Ali raised an eyebrow as she jogged alongside him. "You changing outfits mid-sprint?"

Fin gave a slight smirk. "Depends on what drops next."

[Roll – 250 PP]

He tapped again, still moving.

This time, the cube flared with crimson-gold.

A wave of heat pulsed through the air around him. His eyes narrowed as the display lit up:

[You have rolled - Technique Upgrade: Shrine - Mythic]

[Cleave Unlocked / Dismantle Enhanced, efficiency improved by 5%]

Fin's foot faltered, just slightly, as his mind was flooded with data.

A sensation like thunder crawling beneath his skin.

The Shrine inside his body trembled, growing, unfolding like a skeletal flower.

New understanding clicked into place.

Cleave.

A slashing technique that adjusts itself based on the enemy's toughness and cursed energy resistance, always aiming to cut them down in one brutal sweep.

He didn't need a Domain Expansion to use it… But it demanded direct contact; otherwise, not too difficult given his inclination for hand-to-hand combat.

His hand twitched, he dished out a few dismantles towards the trees, cutting them as he normally would; however, it felt different. The strikes wasted less cursed energy. Each cut would now burn less energy for the same amount of damage.

"Damn," Fin muttered, breath quickening from excitement.

"Let's see what kind of fashion statement a legendary sorcerer makes," he muttered, opening his inventory.

The outfit came in pieces: wide-legged white hakama pants, a sleeveless black undershirt that clung to his form like it was tailored just for him, the iconic open-sleeved haori with its soft folds, and a black sash to tie it all together.

Fin raised an eyebrow at it.

Ali flickered into view behind him. "You're going to try it on right here?"

"It's not like anyone's watching."

"I am watching."

"You don't count. You're a hologram."

"I'm sentient."

"You're judgy."

"And you're half-naked."

Fin rolled his eyes and tapped the equip command anyway.

The change was instant.

His tattered robe faded into blue particles. The haori formed around him in a smooth, flowing motion, folding against his body like a second skin. The sash wrapped itself before knotting perfectly at his waist. The undershirt stretched across his chest, and the pants settled into place with a featherlight drape.

Fin blinked.

He looked down at himself. Flexed once. Then twice.

He raised his hand, cursed energy pooling around it.

Ali blinked, her projection rotating in the air to match his pace.

"You look… a little ridiculous, honestly."

Fin smirked. "Fuck you, I look clean."

She rolled her eyes. "You look like a cosplay model who accidentally learned martial arts."

Fin tilted his head, letting the white sleeves sway with the movement.

"…Yeah," Fin said softly. "I think I'm keeping this."

Fin gave a final nod, then surged forward.

His legs coiled with cursed energy, and he launched off the sand like a spring. His body cut through the underbrush, bounding across roots and fallen trees. Each step was quiet; he vaulted from stone to branch to trunk, twisting mid-air when needed.

The rising dawn filtered through the trees in golden shafts. The scent of ash grew stronger.

Then—

He crested the final ridge.

Fin skidded to a halt at the top of a broken hill.

Below him: the crash site.

A massive trench was carved through the landscape. Trees snapped like matchsticks. Fires burned across broken hull fragments. Mind flayer corpses, twisted and leaking dark ichor, lay strewn between crushed demons and other poor souls who didn't survive the descent.

The Nautiloid itself rested in pieces, the once-great ship now torn open like a cracked shell.

And there—

Amidst the wreckage and sand—

One body stood out.

Laid simply upon the sand of the beach, armour scorched and cracked, lay a figure unlike the rest.

A female dragonborn.

Her skin was a pale white, with scales, jagged like stone. A plethora of horns on the back of her head. Her face was fierce even in unconsciousness, mouth slightly ajar to reveal a faintly glinting, razor-sharp teeth

Her armour, blackened steel with crimson engravings, was warped but still clung to her muscular form like it had been grown, not worn. Embers crackled around her still body, casting her in a devilish glow.

Eyes closed.

But the blood-red slits beneath her lids still twitched.

Fin's jaw clenched.

Ali floated into view beside him, staring down with wary interest.

"Is that...who I think it is?"

Fin's eyes didn't leave the prone dragonborn. His voice was quiet.

"Fuck"

It was the Dark Urge herself!

...

[End of Chapter]

And thus starts the Binding Vow Merchant Arc.