Infinite Evolution of Kamen Rider

[OverOverTheRevolution!][Ready? Go!][FeverFlow!][Fuhahahahahaha! Fuhahahahahaha!]

—Kamen Rider Evol: Black Hole Dragon Form, Heat Flow Mode!

When Mr. E absorbs a metal panel infused with specialized black Lost Bottles, he reverts to his original, bizarre, basilisk-like form. However, Ryuga Banjo—Longwo—refuses to embrace that monstrous state. Instead, he activates the Heat Flow Mode of the Black Hole Form, mirroring the power of the evolved state without losing himself to the darkness.

This mode does not simply boost his strength. It grants him a far more dangerous ability: the power of instantaneous wormhole travel across space.

Despite its power, Ryuga's transformation isn't stable. He had been forced to trigger this form while running low on energy—it wouldn't last long.

[Ready? Go!][BlackHoleBreak!][Ciao~]

He spun the joystick quickly and unleashed his finisher. A swirling black hole opened—not to strike Mr. E, but in the skies above.

"You're trying to take me off Earth?" Mr. E asked, instantly reading Ryuga's plan.

"Exactly," Ryuga replied, stepping forward. "Without the Evol Trigger, your return to Earth will depend entirely on your luck."

With that, he grabbed Mr. E—who surprisingly offered no resistance—and flew upward into the black hole.

Mr. E knew exactly where he stood. He was no match for Longwo in this state. Fighting back would be meaningless. Better to survive now... He was confident he'd return to Earth someday—stronger.

Ryuga, too, believed that E would eventually come back. But without Pandora's Box or the Black Hole Trigger, he'd be no more than a regular villain—one the Kamen Riders could handle.

In the meantime, there were other nuisances—like Namba Heavy Industries—who could provide useful experience for Build.

And Ryuga? He had no intention of returning anytime soon. This world didn't even have the kind of girl he liked. It was time to find a new world... and maybe a girlfriend.

As he and Mr. E ascended into the black hole, Sentou (Build) and Kazumi (Grease)—the loyal comrades who had fought beside him—finally broke through the barriers and arrived at the top of Pandora's Tower.

"Ryuga!" Sentou shouted.

"Sentou, Kazumi, Misora... we'll meet again someday," Ryuga said calmly without turning back.

"Hahahaha! I'll be back someday!" Mr. E laughed. "War Rabbit, Misora, Earth—wait for me!"

The fact that Mr. E mentioned Misora… it seemed even he had grown some semblance of human sentiment during his time on Earth.

As Ryuga and Mr. E disappeared into the black hole, it closed behind them. With the energy source gone, Pandora's Tower and the Sky Wall lost their power. They crumbled into nothing more than ordinary walls—no longer a threat to human movement or unity.

Sentou looked down at the Cross-ZDragon in his hand and silently made a vow.

"Ryuga… I swear I'll protect the Earth, our base, and the home we built together… until you return."

To Sentou, it looked like Ryuga had sacrificed himself to drag Evolto into oblivion. He didn't know about Evolto's wormhole ability—or Ryuga's escape plan. Still, he returned to Café Nascita and waited… even if the wait turned into eternity.

On an Unknown Planet in the Build World...

Ryuga and Mr. E emerged from the wormhole and crashed down on a distant planet teeming with life.

"You're on your own now," Ryuga said. "Whether you make it back to Earth or not... that's up to you."

Then, hesitating briefly, he pulled a black metal plate—temporarily absorbed earlier—out of his body and tossed it to Mr. E.

"You're giving this to me?" E asked, genuinely surprised.

"You'll need it to travel through space. Otherwise, you'll be stuck here recovering for tens of thousands of years—unless you feel like drifting back to Earth one millimeter at a time."

"Sentou is probably waiting for you... You really want to come back and find only a pile of dust?"

"Ahaha! I'll remember this favor," Mr. E replied, catching the plate with a strange glint in his eyes.

"Good. Then I'm off."

With a nod, Ryuga vanished.

"Ryuga…" Mr. E whispered to himself, canceling his transformation and adopting the form of his usual disguise, Shi Dongyi.

Ryuga had not left the planet yet. Since he had removed the black metal plate, his Heat Flow Mode was deactivated. Without it, his standard Black Hole Form couldn't generate wormholes. Until he absorbed another plate, he was grounded.

The planet had intelligent life, but human civilization had yet to arise. No cities. No technology. Just wilderness.

Ryuga found a valley with a mild climate and settled in. The atmosphere was breathable, so he dispelled his transformation. Though as a member of the Blood Clan, he could survive even in the vacuum of space, comfort was still preferable.

He sat on a dry rock, pulled out Pandora's Box, and took out both the Black Hole Trigger and the Danger Trigger. Inserting them into the box, he produced two metal plates—one black, one white.

Each had unique abilities.

Black Plate: Enabled wormhole creation and interstellar travel.

White Plate: Even more mysterious—capable of connecting parallel worlds. With Evolto's energy, the two plates could even merge those worlds—just as Sentou once used them to create a peaceful new Earth.

Ryuga had no intention of merging worlds. His goal was simpler: to absorb the energy of both plates and gain the ability to travel between them freely.

He sighed and cursed his "System" once more. Beyond depositing him in this universe, it had done nothing. No world travel, no guidance—completely useless. If it weren't for Pandora's Box, he might've been stranded here forever.

Muttering to himself, Ryuga began slowly absorbing the black plate. Not by shoving it into his body like before, but by methodically drawing out its energy.

He had done this once before, absorbing just enough energy to briefly activate Heat Flow Mode. But that plate hadn't belonged to him—he had only managed to siphon a small portion.

Now everything was in his control. With Pandora's Box and the Black Hole Trigger, he could make as many plates as needed. He'd keep absorbing them until he mastered wormhole creation entirely.

Then, he would do the same with the white plate—and when both were fully absorbed, he would be able to open wormholes between parallel worlds.

Finally... true freedom.

With that resolve, Ryuga calmed his mind, closed his eyes, and began his solitary mission.

The great work had begun.