At Weekend Base

Kaito: Goddammit! They need to hurry and defeat Diablo's monsters otherwise the stars of demons will open!

Merlin: They only need to stop Diablo knowing the Star will grant regain his power again! The Star link between humans and demons will be coming out! *in serious*

Emma: Touma.... *Worried of her lover*

Mystical Voice: Emma.... You know they can not survive and stop the Prophecy from Happening... But... I can help you to stop this....

Emma: Nabu....

Nabu's voice: I made the promise to your father and grandfather that I won't take your life away from your friends and family... But the choice is your own witch...

As Emma hesitates and remains in silence, watching all the riders are helplessly and unable to defeat Seven Sins and Diablo's monsters, while Kaito and Merlin find the way to stop.

And so.... She decided to fight and help them before she could do something, suddenly her wrist got caught by grib. Making her startled, she turns revealing Allen.

Emma: Allen?

Allen: You.... You're going to wear the helmet aren't you? *concern*

Emma: I....

Allan: It's too dangerous! Looks.... I know Sword of Logos and the Golden Sorcerer hadn't been in agreement or get along for thousands of years ago... But if you wear the helmet you won't be able to return back!

Emma: I know that, looks... We can't defeat Diablo and his demons.... But we need Doctor Fate.... *Suggest*

Allen: Emma...

Merlin: She's right....

Allen: Master?! *In shock looks betrayal*

Merlin: She's right... We need the help she can get... But Fate's power are greater and stronger than mine... But Doctor Fate can help us to aid the riders and bring back up to stop Demons... *Admit it*

Kaito: Wait.... Are you talking about Doctor Fate? Because I heard a book a bit about you... *dumbfounded and confusion*

Emma: Allen.... I know you're worried about me... But knowing what happened would risk the greater good, but right now... They need my job with Doctor Fate... It is the only way we got choice... Please.... I am not asking you as my friend... I am asking you as my brother... Please... *pleaded*

Allan remained in silence and heistiate, knowing he care and see Emma as his sister. He wanted to protect her, but knowing she wanted help. He finally made his decision.

Allan: Fine.... Go... Go help them... *Finally agreed*

Emma: *Smiles* Thank you....

She turns facelessly in a random direction. Emma shut her eyes concretrate chanting the summon spell revealing a Golden Helmet.

The Helmet of Fate

Cecile: Emma.... Are you sure about this? About wearing the helmet?

She turns facing, revealing her familiar Celine. A talking cat.

Emma: I have too, Celine... My father died protecting me, I never got to know him... But my grandfather risked his life to save me and my friend... It is my family's legacy. It is my fate.... Lead me your strength Grandfather... Nabu.

She places the helmet on, engulfed with the powerful bright light.

At Ritsuka

After she abandoned and run away from her older brothers. Ritsuka is currently alone watching all the kids with their parents having so much fun, happy and smiling.

She felt so... Envy and jealousy seeing kids having a great time and spending time with their parents, knowing their parents have passed....

???: Ritsuka!

Making her head glance up, recognizing hearing of nearby voices, before she turns her head. Is her father.

Ritsuka: Da....

Before she could say a word, cut off seeing he was not alone. Revealing him with her two older brothers, her expression turns sour and bitter.

Ritsuka: What do you guys want?

Arthur: Ritsuka.... We know why you don't want to fight...

Fujimaru: It is about Shawn it is?

Ritsuka:.... Why do you bring our friend's death for nothing? *Scowl*

Arthur: He didn't die for nothing.... He died saving us. *defended*

Fujimaru: He right.... But if it wasn't for Shawn... One of us wouldn't come here, that's our mission, saving futures!

Suddenly their devices creating sparks, causing their bodies in pain weakly to kneel down, Shirou rushes to his elder son's side.

Shirou: Everyone! You okay? *worried tone*

Arthur: I'm fine... I'm fine... It's just... Why do we feel so hurt?

Before they could speak any words, suddenly Shirou takes out his phone before answering it.

Shirou: Uncle? Wait?! Deadman is at Alaska?!

At Alaska

Seeing of Demons, facing his arch nemesis Eligor, Sins of Wraith, Falchion and Durandal facing like other sins Amon, Druj, while Arynet and Belial stay out of battle.

Falchion try to slashes against Amon's chest their attacks are too vulnerable and not effected, Amon return slashes on Falchion's chest causing him stumbled back.

Falchion: Damn! What the hell is he?!

Demons: They're the Seven Sins! The demons' most strongest and powerful elite soldiers! They're near immortal and indestructible!

Falchion: Great.... That's what I need to hear about... *In sarcasm*

Seeing Belial's expression having been almost too tired of this, while Arynet playing with her doll.

Arynet: You are not going to join?

Belial: No.... I am waiting for my rival to come... Let them have their funs... And now for the finishing part....

He slammed his right hand against the ground, creating of the powerful light beam shooting out the sky.

Belial: (The Hell have began... There no one can stop us...) *Speaking in Demonic Language*

At Shirou and his Kid

Shirou: I understand.... Excuse me... I have to go... *rushes out*

Arthur: Dad! It's too dangerous... Let us go, with yo-

Shirou: No, I can't. But... You guys should be focusing what you are doing.... There's something more important to know about.

Ritsuka: Daddy... You can't go...

Shirou: It's okay... Leave it to your father... I promise... I will return soon... We will stop Diablo together... *reassure smiles*

At Weekend HQ

Kaito: What the status?!

Weekend Member: Signature of Demonic Energy leaking out, the stars connected the bridges between our world!

Kaito: And Diablo?!

Weekend Member 2: No sign of him, sir!

Kaito: Goddamn!

Inner Merlin: That doesn't make sense.... Diablo needed the Star to regain his power and connect bridges of our two worlds... What does he want?

His inner world was snaps out, making everyone turns attention revealing is Shirou arriving.

Kaito: Shirou? Why you here? Where is Century? *asking in surprised*

Shirou: Sorry! Also... Where Emma? *asking whereabout*

Merlin: She have other thing to do... But did you really leave your two chil-

Shirou: I know, but I know the world is coming to end, but I can't ignore this! We have to do something!

Azari: But doesn't Diablo need like 5 spots or something? Could it be like a heart or something?

Merlin: Wait... The heart you says...

He in thinking gestures, in few seconds before he open wide in realization.

Merlin: Of course! I remember!

Kaito: What it is?

Merlin: Karizaki, think about it. Why does the Diablo needed the star for inverted Pentagram.

Kaito:.... *got realization and turns irritated* Goddamn! How come I missed it?! You! Search up the center of the Star! *order his subordinates*

Weekend Member 5: Yes, sir! *nodded her head and typing keyboard*

Shirou: Uncle... You kno...

Kaito: Yeah... I found the reason why. Is to be at heart of inverted pentagram! The spot that could only need for enables the most energy output, is the biggest volcano... *Serious tone*

At Mt Fuji

Seeing the five lines from different countries forms the stars creating the Deadman's symbols in the sky. Connecting both of their worlds as one, showing the demons are slowly leaking out of the sky.

Diablo: (The time has come! I shall regain my true power once and for all!) *Demon tone*

Large projectile Stamp marked on top of the Mountain, filling with demonic hellfire, before Diablo jumps to regain his power.

Shirou exited out of portal of book, making him forms the shock looks expression.

Shirou: Mount Fuji....

Suddenly someone jumped out from the top of Volcano and landed on ground facing at Shirou.

Shirou: Diablo... *glaring at him*

Diablo: My grand power have finally return to me... Will shall put an of this world.

Shirou: I going to stop you!

???: No... I afraid you will be facing me...

Suddenly someone teleported in front of Shirou. Revealing his arch enemy. Belial Sin of Pride.

Shirou: Belial.... *growled*

Belial: That's right.... Seems like we have an unsettled score to do... Looks like you don't have your traitorous partner with you...

Shirou: Out of my way, Belial! I don't have time for this! *take out his stamp*

Belial: *Scoff* Still stubborn and reckless human.... Lord Diablo if I may?

Diablo: Be my guests....

Rex!

Belial transformed in his demon true form, fired the powerful blast toward aiming at Shirou.

Shirou: Henshin!

Buddy Up! Ohing! Shoning! Rolling! Going! Kamen Rider! Revi! Vice! Revice!

Belial let out of the scoff, manifesting summoning his sword, seeing of Revi dashing forward in full speed ahead. Revi threw the first punch, contact against the blade of the sword of Belial.

Revi focus facing his rival, while Diablo begins his rituals to open the gateway of human worlds and demon worlds let out of laughing.

At Camelot

Kagami: Arghhh!! *panting*

Vulko: Hang in there, Lady Kagami... You must be strong....

Kagami: Suhara.... *worried of her husband*

???: Kagami Tsuguri.... Current Holder of Sword of Smoke, Heir of Tsugumi Clan and Protector of Japan....

Kagami: Yo-You?

???: We really need your strength... To end this.... In fact... I might have a solution for your current Condition...

At Weekend HQ

Seeing of innocent people running away in fear, as the demons manages to contact of their worlds. While Weekend Soldiers shooting their Anti-Demonic Weapons.

While Kaito with Merlin and Azari watching the Volcano erupting, and demons leaking out.

Azari: Is this really the end for us?

Kaito: Yeah... Seems like the demons are finished with our worlds....

Merlin: That right.... But... We can defied our fates....

At Emiya Siblings

The siblings clutches their body feeling like the time effected against them in pain.

Fujimaru: Dammit.... Dad must be fighting someone else, if dad gets killed, we will be erased from existence! *gritted his teeth*

Arthur: Yeah.... Ritsuka... We don't have time and argued about it... If we don't henshin as Century. The world is about to end....

Ritsuka: Why should I care?

Fujimaru: Can you stop acting like a spoiled rotten brat?! Look around it! Our friends are in trouble for the future! Don't you care about them?!

Ritsuka: Shut up....

Arthur: We're the only ones we can stop them!

Ritsuka: I said shut up...

Fujimaru: What are your problems!

Ritsuka: My problem is me! *lashes out*

Hearing the words out of it, making both of her older brothers to be let out stunned....

Arthur: Ritsuka?

Ritsuka: The reason I really hate myself is because I am weak.... I let dad die after our home was destroyed... I was really scared to lead those demons to our home.... I feel so useless, seeing all our friends and family die because of us....

Fujimaru: Ritsuka....

???: Ritsuka Emiya....

Making her open wide, feeling her mind warp in the inner world. She turns around, revealing the golden and blue sorcerer wearing the same helmet Emma wore.

Ritsuka: Wh-Who are you? *feel frightened can't help curious*

Doctor Fate: I am Doctor Fate, the Sorcerer of Lord of Order...

Ritsuka: Doctor Fate?

Doctor Fate: I have taken your mind to subconscious in space and time, the inner space is slower then the outside world... We communicate... You must become Century as one...

Ritsuka: Why are you pushing me?

Doctor Fate: I am not pushing you... I want you understand why do they fight?

Ritsuka: What? What do you mean, why do they fight?

Doctor Fate: Ritsuka Fujimaru.... Do you think, you're not worthy for become Kamen rider? But there is more then that.... The reasons why they're fight is to protect innocent people, their love one, and family as well.

Ritsuka: Family.... But.... Why are you telling me this?

Doctor Fate: Because.... You wanted to see your father again? And doesn't want him to fight? But knowing the risks to do, but call it fatherly instincts.

Ritsuka: But... What if I not worthy enough... That I can't henshin with my brothers....

Doctor Fate: There is more then that... Reasons is to become truely as Kamen rider Century... Is to have the Have strong connections of Bonds... Fate does not mistakes.... Is to fight against Chaos....

Ritsuka: Bond... Connection.... Of course! *realization*

At Future

Vice got Woz

Mike got Ryugen

Rin got Poppy

Touma got Wizard

Leon got G3-X

And Yuri get Zero-One

As the riders get pushed back by the demons riders with resistance soldiers and refugees, as they're slowly to end them.

Poppy: I can't go on, anymore!

Zero-One: Is this end for us?

Ouja Demon: Ahahahahaha... Looks like this might be end for you guys!

Woz: Wait, you guys can talk?! I thought they didn't talk move like puppet! *breaking fourth wall*

At Past

Revi struggled to fight against on Belial due to his new power given by Diablo blocked by powerful barrier defenses.

Belial: You're too late... Lord Diablo will finish the ritual the humanity will be gone forever! *chokes on Revi's throat*

Stamp by! Revi-Vice Slash!

Revi swing his sword in powerful energy slash against the abdomen of Belial, but have no effect on him. Belial counterattack swung his sword in powerful slashes.

Revi: Dammit... You gotten stronger for this... Am I not really strong for this?

Belial: Even though we have interesting rivalry, I afraid this is the end... Darkness End! Pride End!

He performs the stances, his blade cover with like red blood energy on it. He swing throw his sword in powerful slashes against on Revi, as it hit him.

Making him scream in pain, forcing him to revert back in his citizen form to fall down.

Belial: You manages to survive this? Good... I impressed for your determine and unwilling to give up and away for your struggling. But... I believe this is end for you....

Shirou struggling trying to get up, feeling the pain against on his body. He unable to do anything seeing Diablo swing his sword in powerful slashes forward at him.

Before it could reaches toward him, suddenly there is triple powerful energy bladed disc out of nowhere block and deflected against on Belial, forcing him to stumbled back and stab his sword against the floor.

Shirou and Belial look at the one, who is responsible for the attack, revealing it is Shirou's kids!

Shirou: Guys....

Fujimaru: Hey, dad sorry to keep you waiting?

Ritsuka: Papa! Leave it to us!

Arthur: Yeah... We are going to end this... Right now!

Belial: Hey. Who the hell are you?

Flashback

After talking to Doctor Fate, Ritsuka returns to the conscious and reality world.

Emiya Brothers: Ritsuka!

Risuka then turns to her brothers, rushes over to them, giving them a group hug.

She then breaks off with an apologetic look.

Ritsuka: I'm... sorry... When I first saw dad, I got scared that if we fight... We wouldn't be able to see him again.

Arthur: We all have something to be afraid of... That's what dad taught me.

Fujimaru: I get to see our young version of Great Uncle and you get to have a conversation with dad? *Chuckles*

Flashback ended

Arthur: Ready? *looks at his younger siblings*

Fujimaru/Ritsuka: Yeah!

Emiya Siblings: Henshin!

Century!

And so Fujimaru and Ritsuka have merged Arthur into as One. Summoning the armor parts on Century's forms they finally transformed as True Kamen rider Century!

Shirou: Guys.... *can't help smiles at them and proud*

Belial: So... You thinks that fancy new rider is going to stop Demon Clan? Don't make laugh!

He charging forward at Century, as the rider stand still. Belial swing his sword in first move before it could make contact, suddenly Century vanished in sight.

Belial's sword misses the attack hitting the air, the Leader of Sins searching for his target in area. His instinct tells him to turn felt the nearby presence is behind him.

Making Belial turns, revealing Century have teleported behind him. Belial unable to react received the powerful punches forcing him send flying in air against Mt Fuji.

Forcing Diablo stop his ritual and turns, causing his expressions turns shock.

Diablo: (Belial?!) *Shock tone in Demon Language*

Shirou: Sugoi....

At Future

Before the Demon Riders with their army could approaches them, suddenly they screaming in pain.

Wizard: What?

Poppy: What happening?!

Kaito: That kid... They're finally did it! They're becoming Century! Great!

Making everyone of resistances and refugees can't help a smiles and celebrate their future is going to changing.

The demons cannot accept it, so they decided to end them. Giving all their powerful attacks at the riders. Before it could reach them, suddenly blocked by the powerful Ankh symbols, making everyone forms surprised looks.

Revealing Doctor Fate.

G3-X: Is that....

Wizard: Doctor Fate!

Doctor Fate: The Chaos must be removed... Order must returns for balanced...

Before the Demons could attack, but Doctor Fate is quicker using the spells to creates magic chains with holy against demons, causing them in pains and struggled to escapes.

Doctor Fate: Go back where you belongs.

Summoning of portal from below of demons, causing them drop through the portal before disappearing.

Doctor Fate turns attention toward on the Riders.

Woz: Amazing! Thanks for your help, dude!

Doctor Fate:....

Woz: Not much a talker.... Huh? Geez, what DC's superheroes doing here? *breaking fourth wall*

Wizard: Fate! What you doing here, also... I thought we have a dea...

Doctor Fate: Touma, it me....

Wizard: Emma? *Surprised tone*

Doctor Fate place her hands on her helmet, before pulling to remove it, causing her return back to normal revealing is Emma.

Wizard/G3-X/Zero-One: Emma!

Wizard rushes and first one to hug her, she smiles and hug back. Before Wizard pulled off.

Wizard: What you do...

Emma: Nabu gave me the spell, that allows me to temporarily arrive of this time of the future.

G3-X: I thought...

Emma: He possessed me? No. Nabu allows me to take control of Doctor Fate's powers, also... I recruited our friends to joins and help us stop Demons invading the worlds!

G3-X: Really?!

Zero-One: That is saikou! *gives thumbs ups*

Emma: Yeah, we need to hurry and returns back to our time! Touma... You and Shirou with Vice and Century are the only one to stop Diablo....

Woz: What? What is she talking about?

G3-X: She must be referring to seeing the future after wear on the helmet.

Woz: I see... Huh?! She can see the future?! *Shock tone*

Poppy: That is impossible! I thought Fate of Helmet is a myth! *Staring at helmet*

Emma: Yeah... That helmet used by my grandfather and father... Also... Nabu doesn't like Mage Association as well... See you as arrogant and seeing you mages as fool... *Sheepish smiles*

Poppy: I... I... I see.... *Slumps in depression aura*

As Ryugen gently patted her on back, suddenly their clones riders disappeared and their bodies fading away with golden particles.

Vice: Whoa?! What going on?! *Looking at his hand*

Emma: I place the spell on you guys, we going returning our times. We have to go now! *place helmet on*

Kaito: She right! It's time for you guys returns to your era. Also... Here a present for me! Take it! *tosses new Vistamp*

Vice caught it. Revealing Neo Batta

Vice: Thank you, Grandpa Kai-pie! It's a good things do happen if you keeps your promises!

Kaito: I leave it you guys! Kamen riders are Bloody Legends immortal never stop fighting!

Touma: For a sake of a brighter future...We'll have to press on a little bit more. Emma?

Doctor Fate: Got it!

Doctor Fate uses the spell to engulfed on the heroes with bright light disappearing including Doctor Fate, to returning their time.

Their final battle have come to end. 

Next chapter on (ArseneLupinX)