A/N: Here is an extended version of my RISING OF THE SHIELD HERO/KAMEN RIDER ZI-O crossover.

"THE RISING OF THE SHIELD DEMON KING"

The Shield Hero was on his knees in front of the king, his arms bound behind him. He was accused of rape by his companion, Myne. The Spear, Sword and Bow Hero also looked at him, with the Spear Hero glaring at him with disdain.

It was all a setup from the start, just a ploy to make him look like a criminal, to be reviled and hated.

They were even calling him the 'Shield Demon'.

Well, if that was the case, then he might as well show them what a real demon was like.

His head rose as he locked eyes with the king who suddenly felt fear.

"Your time has run out," the Shield Hero growled and that was when he summoned an ornate golden belt around his waist. The ropes binding his arms together also dissolved into nothing, much to the surprise of everyone in the throne room as he stood up.

"Guards! Guards, restrain him!" the King Aultrcray demanded. The knights drew their weapons and went to grab the Shield Hero but they were immediately repelled by a golden shockwave coming from him. They crashed against the wall and were knocked out.

The Shield Hero let out a scream of fury as the ground under him cracked to form a clock face. Then, all of a sudden, lava burst out of the ground and filled the cracks, creating a glowing clock face with the kanji for 'RIDER' in the middle.

Nobody moved, too awed and frightened by the sight.

"Henshin!" the Shield Hero roared as he slammed the two red buttons on his belt.

[THE BLESSED TIME! THE GREATEST! THE STRONGEST! THE KINDEST! THE ULTIMATE SUPREME KING! OHMA ZI-O!]

Spinning golden rings of power spun around the Shield Hero as he was covered in a golden aura. His body became encased in a familiar suit of armor before his visor lit up with the word 'RIDER' done in red kanji. His armor was the most regal gold and black with wing-shaped shoulder pads and a golden diagonal band that he wore like a sash over his chest. Black clock-like devices decorated his chest like badges. His black helmet covered his whole face like a mask with a gold ring surrounding the faceplate and golden antennae. Hanging from his back like a cape were a pair of metal clock hands. He still wore his shield on his left forearm, though, but now its appearance had changed to match his armor.

The other Cardinal Heroes were stunned. While they had come from Japans from different alternate worlds, they recognized the figure the Shield Hero had transformed into.

"No...no way..." the Spear Hero stammered.

"Ka...Kamen..." the Bow Hero started, eyes wide.

"Kamen Rider," the Sword Hero finished.

Myne was petrified as she saw the figure. She could feel his power as it filled the chamber. The king had landed on his throne, face pale.

"Who are you!?" he demanded. "What are you!?"

"You call me 'Shield Demon' but my name is Sougo Tokiwa," the Shield Hero introduced himself. "I am the Supreme Demon King of Time, Ohma Zi-O."

He really wished Woz was here. He would like his most loyal and favorite vassal to announce his appearance with a 'rejoice'.

"Demon King...?" Aultcray uttered.

This was the day this world would be introduced to Ohma Zi-O and learn to fear his great power. He could be their hero or he could be their ruler. Right now, they were brought face to face with the Demon King.

Ohma Zi-O turned his gaze to Myne who gasped. Lifting his hand to her, she cried out in shock as she was lifted off the floor by an invisible force and pulled into his hand which he used to grip her by the neck.

"MALTY!" Aultcray shouted.

"You dare accuse me of a crime I did not commit and used your beauty to manipulate that pathetic Spear Hero," Ohma Zi-O growled. "Then allow me to take away that which you value the most."

Myne struggled but could do nothing as Ohma Zi-O used his power on her. Her red hair began to fade as her complexion started to pale and age. Once he was done, he released her.

Myne was on her knees as she stared at her hands, the skin now covered in wrinkles. She touched her previously smooth and soft skin and found it covered in wrinkles as well. Her hair which had been a vibrant color similar to red wine had become the same hue as her father's.

The three Cardinal Heroes and Aultcray were horrified by what Ohma Zi-O had done. In a matter of seconds, he had aged Myne by decades.

"No...NO!" Myne screamed. Her youth, her beauty, it was all gone! "Give it back! GIVE IT BACK!"

"RETURN MY DAUGHTER TO NORMAL, DEMON!" Aultcray screamed in outrage.

"You are in no place to make any demands," Ohma Zi-O retorted. Out of the corner of his eye, he saw the Spear Hero coming to attack. The Demon King sidestepped and the Spear Hero ran past him before he stumbled to a stop.

"How dare you do that to Myne!?" the Spear Hero screamed.

"I have simply given her the punishment she deserved."

"Nobody deserves that!"

"Perhaps in your opinion but it is my judgment."

"I'll make you change her back!" the Spear Hero charged again but Ohma Zi-O used his telekinesis to throw him straight into the wall.

Ohma Zi-O looked at Myne who was sobbing. He might be ruthless but he was not without mercy. He approached the girl who looked at him in terror as she crawled backward.

"Seize him! Stop him!" she yelled at the guards but they were rooted to the spot by fear. "Are you idiots deaf!? Do as I say or I'll have you all executed!"

"They won't do anything," Ohma Zi-O said coldly. "They fear me more than they fear you."

Myne was speechless. The Shield Hero had just proven his power, and how much he outclassed them all.

Just what had they summoned?

"I am, however, not without mercy, child. If you wish to have your youth restored, then perhaps it's time for you to speak the truth. After all, a wise man once said that the truth shall set you free."

Myne looked to her father who seemed terrified of Ohma Zi-O. He had done this to her so he could reverse it. However, he was asking her to admit she had lied and that would totally ruin her credibility.

"Or you can say nothing and live out your remaining days like this. It matters little to me."

Myne, or rather Princess Malty, was not an unintelligent woman. Short-sighted, selfish, manipulative, and spoiled to a ridiculous degree yes, but not unintelligent. She could manipulate, plot, and scheme like some of the best. In a situation like this, normally she'd perhaps think of some way to spin the truth, especially with her father right there, the man who'd believe absolutely anything she said if she just sniffled and pouted at him.

But Malty was also incredibly vain and often found herself superior to others for many reasons, one of which was her beauty. It's what she defined herself with, being the beautiful and pure-looking princess who could order or dupe anyone into doing anything she wanted. However, her mother already took away her role as the heiress to the throne and she had no other career aspects she'd prefer since it was boring book work, marrying some old creep to keep the nobility happy or a job which was beneath a princess. Her youth, her beauty, it was all she had and she couldn't lose it. She did not want to be an old hag for the rest of her life. She'd rather die.

"I LIED!" she screamed out. "I LIED ABOUT IT ALL! HE DIDN'T RAPE ME! I MADE IT UP TO MAKE THE CHURCH HAPPY SO THEY'D HELP ME TAKE THE THRONE!"

"No..." the Spear Hero was speechless as the Bow and Sword Hero looked upon her in disgust.

"Malty..." Aultcray was horrified. "No, this cannot be true!" He was in denial. "Shield Demon, you coerced her!"

"I simply encouraged her to speak the truth," Ohma Zi-O countered. "And everyone has heard. Did you not say that this whole sham of a trial was being broadcasted throughout the kingdom?"

Aultcray flinched, realizing that his grand scheme to show the Shield Devil as the monster he was and just destroy the belief of the cursed demi-humans was now backfiring. Granted, Ohma Zi-O was showing terrifying power, but so far he hadn't hurt anyone that hadn't attacked him.

"Now then, since you've admitted the truth, you may have what I have taken from you," Ohma Zi-O said as he held his hand out to Myne. He was the King of Time so restoring her youth was an easy enough task for him.

In a matter of seconds, Myne was restored to her original youth and beauty. She looked at her hands and touched her face, feeling smooth and youthful skin. She also pulled her bangs in front of her eyes to see that they were red and not grey.

"Since we are all now calm," Ohma Zi-O looked around the room. "Some may argue I did coerce a confession from the princess. So, I shall explain myself and let hard evidence and hopefully logic provide an answer."

Ohma Zi-O then began talking about the chain of events that had him and Myne go to the inn on the night in question. He explained he did not take any wine, and the serving staff at the inn could prove it. He talked to the matron, specifically ordering two rooms for himself and Myne and he gave her the key. He also mentioned that as a Level 1 at the time with 1 attack strength, there was no way he'd be able to pin her down without his armor, which obviously she did not know about. There was also the fact that Malty did not report the attack until morning when anyone else would have run for help right away. Then in addition, why was Malty able to give Motoyasu a gift so early in the morning when no shops were open, especially when she had supposedly just been attacked in the night?

To anyone who knew Ohma Zi-O, they would have wondered why he didn't just kill everyone for the insult of the accusation. But it could be argued that some of his younger self from another timeline bled over into him. He needed to show that, despite his terrifying power, he could be fair and merciful.

Ohma Zi-O approached the king who could do nothing as the Demon King looked him in the eye.

"From the very beginning, you've been prejudiced against me, simply because I was the 'Shield Hero'. Is it because there was another before me who had the title? Did they hurt you in some way that even the name 'Shield Hero' is hated even when the person who holds the shield has done nothing to earn such hatred?" Ohma Zi-O questioned.

"You should know, Shield Devil!" Aultcray snarled. "You, worshipped by those monstrous, evil, demi-humans can be nothing but evil and your actions today show it!"

"Ah," Ohma Zi-O nodded. He turned and walked away from the throne. "So, the national religion shows the Shield Hero as a devil simply because demi-humans revere them. So a Shield Hero sided with demi-humans during some conflict between them and humans. The aristocracy did not like that, so when reverence of the heroes rose to the point of religion, it was focused on the Spear, Sword, and Bow, but since the Shield did not side with them, he must, therefore, be a devil."

Itsuki and Ren looked at each other, their thoughts torn. Truthfully, they first thought that Ohma Zi-O indeed was a criminal of the worst sort. Then maybe a demon even if he did call himself a Kamen Rider. Then, after he could have just destroyed everyone in the room, he calmly stood down, explained his side of the story, even offered solid testimony backed with possible witnesses or obvious logic. Now, he even gave credence to a monstrous amount of bias on the part of the king, who should have been neutral.

"How pathetic, allowing your hatred for the name Shield Hero to color your opinion of me. Now, look at what your prejudice has brought you," Ohma Zi-O sneered. "I have shown you to be cowardly, incompetent, biased, and unreasonable to the point of delusion, although you could simply be a simpering idiot since it seems you believe everything which comes out of your daughter's mouth. A daughter you allowed to travel with the alleged Shield Devil. Surely if you believed me to be so evil, you would have known I would have tried something."

"You-!" Aultcray snarled

"But...if you allowed her to set up this lie...and be so ready to arrest me, in the early hours of the morning, it leads me to believe...you were party to this farce!" Gasps came from many in the room as Ohma Zi-O spun around, glaring at him. "I do wonder what your dear wife will have to say about this?"

"What do you mean?" asked Ren, hand on his sword still, but not moving to attack yet.

"You did not ask about the political system of this kingdom?" asked Ohma Zi-O. "Well, I suppose I can't blame you. Still believing this all to be a game of some kind makes one disregard little details like that." Ohma Zi-O looked at his fellow heroes, including the recovering Motoyasu, "It should be noted to you that Melromarc is a matriarchy. The king here only married into the family and holds no real power. In fact, he was just supposed to keep the kingdom running while she dealt with political talks in the face of the Waves."

Aulcray paled as Ohma Zi-O finished. If there was one thing Sougo Tokiwa excelled at besides his tactical ability, it was his historic knowledge. After he arrived in this world, he used his time to find out everything he could about its history and government. After all, knowledge was power.

"As I understand from my research, the king does not have the authority to make major decisions for the kingdom. He cannot declare war. He cannot broker national dealings. He cannot deal with national politics. He cannot make laws. He can arbitrate internal issues, sit on the throne to decide day to day issues, but anything major which can affect national policy or foreign relations, he cannot decide. Like summoning the Cardinal Heroes."

"What?!" Itsuki and Ren gasped while Motoyasu blinked in confusion.

"The Waves do not affect just Melromarc. It affects all of the nations of this world," Ohma Zi-O grinned behind his helmet. Aultcray was trembling in fury. Likely wishing to stop the Kamen Rider, but Ohma Zi-O's aura of authority likely shut him up. "Again, I checked the history of the nation and others. The Wave visits them all periodically. By summoning all four of us, Aultcray may have instigated war simply because it looks like Melromarc is trying to save itself while the queen plays distraction."

Itsuki gaped, "That...that's not just!" he glared accusingly at Aultcray. "You'd have us defend Melromarc while letting so many innocent people suffer from the Waves?!"

"He simply wants Melromarc to survive while the other kingdoms fall to the Waves," Ohma Zi-O continued. "With the other kingdoms gone, they won't have any potential enemies left. It's impressive, really. Sadly he made the mistake of angering me."

(THE CHURCH OF THE THREE HEROES)

Using his great power, Ohma Zi-O was able to free the demi-humans from slavery. While there were outcries, nobody could do anything to stop him, fearing his great power. Nevertheless, he still helped to fight the Wave and defeat them with ease. He simply had the three Heroes outclassed since he possessed great power before he was summoned to this world.

He had even told the three Heroes that he possessed the power of All the Kamen Riders, and his stats screen reflected this, giving him a level that could not be measured.

His level was: INFINITY.

Ohma Zi-O found himself confronted by the Church of the Three Heroes. He saw the nuns and priests who were armed, ready to fight him. He also knew they were knowledgeable about magic. Standing at the head of the army was the High Priest Biscas T. Balmus.

"SHIELD DEVIL!" High Priest Biscas proclaimed. "YOUR EXISTENCE IS AN ABOMINATION AND MUST BE ERASED! YOU WILL DESECRATE THIS LAND NO LONGER!"

Ohma Zi-O rolled his eyes. A zealot, and one in power. They were the most dangerous of all.

"And yet, you summoned me into your world!" Ohma Zi-O shouted in response. "If you knew this then you could have modified your ritual to summon the three you wanted instead of three heroes and one throwaway!"

"YOU WILL DIE HERE, DEVIL! MAY GOD HAVE MERCY ON YOUR SOUL!"

The Church attacked Ohma Zi-O and he simply raised his hand to them and unleashed his full might. All at once, the members of the Church were thrown into the air by his telekinesis, screaming as they were flung by his power.

"You think you can destroy me, the Supreme Demon King?" Ohma Zi-O scoffed. "Many have tried and failed."

As he no longer desired to deal with the Church, he snapped his fingers and turned them to dust, like Thanos did with the Infinity Gauntlet.

(MEETING MIRIELLA)

"My apologies for my rude showing in your throne room on our second day," Sougo sighed, tilting his head slightly. "But I was on trial for possibly more than just my freedom and I had to poke every hole in the argument I could."

The admittedly beautiful queen, shook her head behind her fan, "No, I understand. I also know my daughter. She's been manipulating her father for years since he spoils her and seems to believe she can do nothing wrong. Despite much evidence proving otherwise." She sighed tiredly. "His hate for demi-humans has him lash out at anything he thinks can hurt them. I only wish he didn't decide to broadcast it through the capital. Now he looks like an incompetent fool who is incapable of ruling fairly. A far contrast from who he used to be."

"Hatred can do that," Sougo acknowledged. "What will you do with them then, Your Majesty?"

XXX

KRC: At the end of "Kamen Rider Zi-O", the future version of Sougo (Ohma Zi-O) is erased from existence. However, I decided to give him another chance as he is summoned to the world where "Rising of the Shield Hero" takes place. He is back in his young body, but he is mentally the same as he was before he vanished. He also possesses all his power so he's very OP. Now this world will learn to fear him as he seeks to rule it with his power. Watch out King, Malty and Motoyasu. This Demon King ain't gonna take any shit.