Wonder Woman walked in: "Let me talk to the Amazons. Our forges create weapons from materials found nowhere else in the universe. They might be able to help."

Day turned into night, and the lab turned into a flurry of activity.

With his relentless drive, Batman works tirelessly, pushing his body and mind to their limits.

Everyone contributed in their own way and watched with a mixture of awe and concern.

Batman's concentration is very sharp.

However, the dark multi-universe is an unpredictable and chaotic realm.

As they neared completion of the device, unexpected complications arose.

The aiming system with such a complex design began to malfunction, unable to withstand the energy output they were experimenting with.

Batman pounds his fist on the console in a rare display of frustration.

"Damn! The system can't handle the pressure. I need to recalibrate, but that means going back to square one.

Green Lantern witnesses Batman's rare outburst and offers a solution.

"Let me try it with my ring. Maybe I can create a structure that stabilizes the system."

Working together, Batman and the Green Lantern manage to overcome this problem, using their combined genius and willpower to bend the laws of physics to their needs.

As the last piece of the device clicked into place, there was a sense of accomplishment mixed with apprehension in the air.

Batman stood back and watched the culmination of his work.

The device is a behemoth of science and otherworldly engineering, with a potential force zone.

Meanwhile, The Flash is running around collecting an array of exotic materials.

Superman and The Flash are tasked with procuring rare and powerful materials.

Superman, standing next to the console, nodded.

The Flash's movement speed allows him to be in multiple places at once, and he responds with a smile: "Got it, Bat. This isn't my first time working on a high-speed assembly."

He showed no sign of suspicion.

As Superman ventures into the depths of space, facing the collapsing Fixed Star and the raw power of celestial phenomena, The Flash uses his speed powers to travel across galaxies in the blink of an eye in search of the rarest materials...

"We needed a power source that could withstand a beam strong enough to evaporate planet-scale water. Something we'd never used before."

As the device takes shape, its design is a testament to Batman's ingenuity and the unique abilities of his allies.

The Flash uses his unparalleled speed to weave intricate wires, his movements blurred.

Batman oversees the gathering, his mind filled with calculations and contingencies.

"We needed a frame that could handle the pressure. Be lightweight, durable, and be able to channel so much energy without melting."

Batman, his cowl casting a shadow over his intense gaze, carefully planned every detail.

Holographic blueprints float in the air, casting strange shadows on the walls.

Back on the ship, Batman works tirelessly, his hands moving with precision that speaks of years of fighting in the shadows.

The first priority was to assemble a team capable of turning his ambitious designs into reality.

Batman's fingers danced across the console, images of alien alloys and composites flashing across his vision hand.

He turned to his companion, his voice a mixture of determination and exhaustion.

"I can search for the remnants of supernovae. The core fragments may contain the energy we need."

Batman is the mastermind behind the operation and he portrays the character.

His voice is consistent, guiding his companions through every step.

"Batman, what about the targeting mechanism? We need something that can withstand extreme temperatures and energy fluxes.

However, this task is not without setbacks.

Every wire and every circuit is a potential point of failure, and there is no room for error.

"It's done. We're ready."

A miscalculation of the energy matrix caused a minor explosion that scorched The Flash's costume. .

The construction phase was challenging.

In a strangely dark multi-universe, Batman embarks on an ambitious endeavor: to build a device that could change the fate of an entire planet.

They are the executors of this race against time, searching for elements in the universe that only exist in legends.

The power source is a fragment of a neutron star, so dense and volatile that even Superman would have trouble maneuvering it into place.

The Batcave was transferred to their spaceship and turned into a crucible of creation.

"Be careful with that coupling, The Flash. It 5.6 needs to be perfectly aligned or we'll run the risk of electrical leakage.

Every part is assembled with care, the craftsmanship of a man who spent a lifetime making the impossible a reality.

It's a patchwork of science and alien technology, planetary ingenuity and otherworldly materials.

The metal that can withstand the heart of the Fixed Star, the crystals that focus energy precisely and the elements that defy the laws of physics - these are the cornerstones of their salvation.

The challenge is huge amounts of, and the stakes couldn't be higher.

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