Ancient Demon Lord Rimuru
Mertinator1905
  • Reads 421,075
  • Votes 11,480
  • Parts 33
  • Time 3h 21m
  • Reads 421,075
  • Votes 11,480
  • Parts 33
  • Time 3h 21m
Mertinator1905
Ongoing, First published May 28, 2022
benimaruchloecieldemondemonlorddiablofanfictionguycrimsonisekairimururimurutempestshizuslimetempesttenseishitaraslimedattakentensurathattimeigotreincarnatedasaslimetimetravelvelgrynd
80 years have passed since Yuuki's defeat. Rimuru, after dwelling for countless years at the end of time and space, has surpassed Veldanava in terms of strength and is, therefore, the strongest being in the Cardinal world. With his strength, he easily dealt with the aftermath of the final battle and accomplished his dream of coexistence between monsters and humans. Although he is happy with the results, his daily routine consists of constant paperwork. During one of these boring days Ciel, who is worried about the mental state of her master, suggests creating an alternate Timeline and traveling back in time. Rimuru, not wanting to do everything over again, comes back with an alternative idea. Going back in time but with one addition: instead of traveling to his original time of reincarnation as a slime, he decides to go much further in time and become one of the ancient demon lords.
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benimaruchloecieldemondemonlorddiablofanfictionguycrimsonisekairimururimurutempestshizuslimetempesttenseishitaraslimedattakentensurathattimeigotreincarnatedasaslimetimetravelvelgrynd
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33 parts

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The ancient Demon Lord Rimuru by CriticalCraft
26 parts Ongoing Mature
More than 200 years have passed since the war between the Empire and the victory over Ivarage. Rimuru is currently sitting in his office, bored out of his mind. His loyal partner Ciel sees his situation and gets an idea that can solve Rimuru's boredom. Come along on your journey as Rimuru travels over 20,000 years into the past to become an ancient demon lord.
Rimuru back 3000 year as a Fifth True Dragon by EliteX0
22 parts Ongoing
During the Final Battle Against Feldway, he had inevitably sent Rimuru to the end of time and space. After Feldway send Rimuru to the end of time and space Rimuru decide to find a way to go back when he's wake up However, Chrono-Saltation, had not only thrown Rimuru to the end of time and space, but it had also locked him out from returning to the world using Space-Time Leap. As if banning Rimuru's existence itself from the world, preventing his return. And Ciel also tell him that his timeline had already destroyed so he cannot go back after hearing that Rimuru start to feel a lot of emotion inside him sadness regret and pain all the emotions you can think of come to him at once and start to make him go insane In the end, Ciel find a way to time travel to the past but risk is to high it can destroy rimuru's Spiritual body, if anything goes wrong. And so can rimuru go back in a time unharmed ? And what will be the consequences of it ? In this fan-fiction, Rimuru will be OP, respectful, serious when needed, and goofy. There will be other characters that will be more powerful than Rimuru at the start. (Keep in Mind, this is Fan-Fiction. So not everything here will be accurate and a lot of things will be changed.) All Rights Reserved
Perfected Tempest by Legandaryus
71 parts Ongoing Mature
Rimuru chooses to return to the past even if he has to erase what he already has to make a better Tempest kingdom than before. Just so he can have even more friends and loved ones then before that he lost, or was not knowledge enough at the time to help grow and become better along with himself and his nation. He also does it so he can make it so paperwork is someone else's problem but he will never say that. Little does he know that doing that gives him an even worse daily activity to deal with... Rimuruism
Tensura: Melting the Eternal Frost by JackDaWeb
72 parts Ongoing Mature
This story depicts an alternate timeline wherein Velzard attends Walpurgis after sensing Veldora's presence. She subsequently meets our protagonist and becomes interested in him after his display at the meeting. After thinking for a bit, she decides to move to Tempest and becomes a close ally of Rimuru. Rimuru and Velzard will sometimes be out of character since it's unavoidable. Our protagonist will be more rational and have an actual spine, while Velzard will not be as cold and ruthless as her canon counterpart. Besides, Velzard is missing a lot of characterization, so I decided to write my own interpretation of her personality based on the original light novel. I recommend at least having seen the second season of the anime since my story will pick up from there. This fanfic will follow the main story beats from the original light novel, meaning some arcs will get glossed over if there are little changes. I'm somewhat OC, so expect a lot of chapter edits or updates because I tend to reread chapters and notice minor mistakes here and there. Also, it goes without saying that I do not own the series 'That Time I Got Reincarnated As A Slime.' Check out and read the original light novel written by Fuse.
Tensura - Beyond Expectations by Rimuru6360
43 parts Complete
A 15 year Otaku girl died while saving a lady from a robber, when she thought her life was over, she got reincarnated in Rimuru's body when he first reincarnated in the tensura world. Now follow Yuu (later named Rimuru) in her adventure. Tensura fanfiction, but an OP main character from the start, HOW!! Just read and find out. Note - This book is the continuation of Rimuru Journey. Note - English is a secondary language, so grammar and spelling mistakes are common. And I don't own "THAT TIME I GOT REINCARNATED AS A SLIME" I only own this fan fiction story.
Restart Everything [That time I got reincarnated as a slime] by TensuraLover
73 parts Ongoing Mature
Rimuru Tempest start having dreams about Shizue Izawa it's been bothering him everyday he always think about her being alive but even if he can bring her back to life he thinks that his broking the promise he made with her but Ciel suggested that how about he turn back the clock so that he can save her before she gave her last wish and correct every mistake he makes in the past This is just a fanfiction I made because I really love that time I got reincarnated as a slime and there's only few fanfiction about it in wattpad so I decided to make my own fanfic I hope you all like it
Rimuru's boredom and his regrets(Time Travel) Tensei Shitara Slime Datten Ken by Sakura-Arashi
15 parts Complete Mature
50 Years after the great tenma war Rimuru is in his office doing paperwork Rimuru being the ruler of the monster nation he's forced to do paperworks bored out of his mind he consult ciel on what to do she then suggest to travel back in time to fix all his mistake and get rid of his regrets GUARANTEED (SHIZU X RIMURU) Possibly (RIMURU X CIEL) (RIMURU X THE DEMONESS TRIO) (RIMUR X VELZARD AND VELGRYND) (RIMURI X RUMINAS) (RIMURU X CHLOE AND HINATA) THIS IS MY 1ST STORY SO IM SORRY IF ITS NOT TO YOUR LIKING TELL ME MY MISTAKES IN THE COMMENTS THANKSSS ⚠️WARNING⚠️ I DONT OWN TENSEI SHITARA SLIME DATTA KEN(THAT TIME I GOT REINCARNATED AS A SLIME)
Rimuru The Void God In The Future Past by MrTempestXD
18 parts Ongoing
After Feldway send Rimuru to the end of time and space Rimuru decide to find a way to go back when he's wake up but Ciel tell him that his timeline had already destroyed so he cannot go back after hearing that Rimuru start to feel a lot of emotion inside him sadness regret and pain all the emotions you can think of come to him at once and start to make him go insane Ciel after seeing this decide to seal his memory away and cause him to go to a long sleep, and when Rimuru wake up had no memory of anything about himself only his name start to go on his own journey
(Old ver. Discontinued) A Dream in the Faraway Past by alen-sotiris
24 parts Complete Mature
Feldway finally had enough. He brought out his true body, crafted by Veldanava's hands, while Rimuru was distracted, fighting an enraged Milim under Regalia dominion Rimuru was unable to contact any of his subordinates Not even Ciel could have predicted what would have happened No one knew, that in the next moments, Feldway would make the greatest mistake of his life And definitely no one knew, the suffering that Rimuru Tempest would undergo ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclaimer : This is the first fanfic I have ever written. So I have no idea how good or bad my writting is. This story is an old version. The rewrite is here : https://www.wattpad.com/story/339737470-a-dream-in-the-faraway-past-rewrite This is a Ciel x Rimuru story (Only true ship! Just kidding) This story has very slow pacing MASSIVE LIGHT NOVEL AND WEBNOVEL SPOILERS READ AT YOUR OWN RISK I obviously do not own Tensei shitara slime datta ken This is simply a fanfiction. Also, all of the fanfictions from which I inspired myself belong to their respective writers The original story of Tensei shitara slime datta ken belongs to Fuze-sensei Cover art : https://www.reddit.com/r/TenseiSlime/comments/xvbpoh/rimuru_and_raphael/ My discord server : https://discord.gg/XesR4HXSW8 A Discord Server in which I have a channel dedicated to my fanfic : https://discord.gg/PDsGW3QNEk
The Destined One by Rimuru6360
28 parts Ongoing
The final battle with Ivarage was, to put it briefly, catastrophic. The majority of the Cardinal World and Tempest were gone. Only people with True Dragon Level strength were alive...Diablo was the only one of his subordinates who was still alive. In desperation, everyone agreed to buy some time for Rimuru to jump into the past and alter the outcome of the battle. So Rimuru, who has forgotten everyone yet remembers everyone, has jumped into the past. But the price of jumping into the past without Ivarage following him was to heavy... all of his power has disappeared. Now, a slime with two unique skills and the memory of a novel called Tensura has begun a new journey in the distant past, when Veldora was just born.
The Last Regret - That Time I got reincarnated as slime by IsTaz2
39 parts Complete
Rimuru achieved everything which was possible but there is one regret he has in his mind even after the 12 years of the great war that he cant save his 'Destined One' So after 12 year he Decided to clear this regret but he don't want to change the whole timeline by directly interfering so he decided to live the whole life again after being reincarnated but this time he has every skill from the moment he reincarnated. Note: I changed rimuru personality a little bit after ch4 , I made him act like evil sometimes. The story also started to change after ch4, You would only be spoiled the events and character names of ln. Thanks @VytsuDesigns for the cover.
That Time I Got Reincarnated as a Slime Again? by StaciaPLE
62 parts Complete
Rimuru had been called to attend Walpurgis, by non-other than Guy himself. Realizing the dire situation, Rimuru makes haste to attend the banquet. But before he could properly arrive, in the middle of the transfer, an unknown mysterious power had sent Rimuru back in time. Back to his first appearance as a slime! This fanfiction is based on the Light Novel! Note: There is a re-write currently ongoing as I've decided to stop uploading chapters for this book. I do hope you check it out sometime.
That Time I got Reincarnated As A True Dragon by nautymanu
107 parts Ongoing
After achieving peace Rimuru was stuck doing paperwork for the last few centuries and was stuck with boredom. Ciel seeing her master's state suggests going back in time to the era when Veldanava created the cardinal world. I don't own Tensura. I adjusted the story to my liking. English is not my main language so don't bother about grammar mistakes too much If you guys want to read advanced chapters go to my Patreon account. patreon.com/Nauty_Manu
The Emergence of Shinsha: A Hidden Legacy by Joeazar2006
7 parts Ongoing
Two centuries after the Great Tenma War, peace reigns in Tempest under Rimuru Tempest's rule. With no threats looming, Rimuru indulges in magical experiments. During one such experiment, he accidentally creates a pink slime with an aura identical to his own. Ciel, Rimuru's ever-present partner, immediately recognizes the anomaly. Upon investigation, she concludes that Rimuru has unknowingly created his own child. This pink slime, named Shinsha, possesses a soul that has traversed through multiple timelines, carrying memories and experiences beyond comprehension. Shocked yet elated, Rimuru decides to keep Shinsha's existence hidden from the world. Though thrilled at becoming a father, he worries about the consequences her presence might bring. For ten days, he secretly cares for Shinsha, learning the unexpected joys and responsibilities of fatherhood. At the next Walpurgis, an assembly of the Demon Lords, Guy Crimson, the Lord of Darkness, notices a subtle shift in Rimuru's aura. His instincts flare up, sensing something different about his fellow Demon Lord. Growing suspicious, Guy confronts Rimuru, demanding to know what he is hiding. Faced with the pressure, Rimuru must decide whether to reveal the truth about his daughter or continue to keep her existence a secret. Shinsha's emergence could disrupt the balance of power, potentially altering the world in ways none of them can predict.
Tensura What If: Silver Timeline (Draft) by CBCTEBAS
112 parts Ongoing
"Raphael stop! Don't do this" "I'm sorry master. My priority is your safety." "yo-your killing them! Stop!" "I have their consent. For master they are willing to accept death" "no.. No! No!" "I'm sorry master... And good.. Bye.." "Raphael!!!" Rimuru went back in time as a primordial demon. Having forgotten everything and losing Raphael how will he survive the world and the consequences of his time travel. The ships are: Luminas Velgrynd Chloe A tensura fan fiction I don't own tensura and any of its characters credits to fuse the creator of tensura. You can read 3-5 chapters ahead for 2 dollars only in Kofi https://ko-fi.com/coverscribe
Rimuru the First Demon Lord by VioMC12
19 parts Ongoing Mature
In this story, rimuru has died but due to his wishes he went back in time and become a slime? now with his new found powers and skills, he strod off into the unknown and it seems he is not a normal slime but a demon slime? and he is the only SENTIENT BEING IN THIS REALM! Now surrounded by mindless demons, what will this slime do? Rimuru due to his strong if not stronger soul changes his gender into a male Instead of veldora, veldanava will be his 'sworn friend' since there are almost no other sentient beings other than a few Rimuru will also later evolve into a primordial instead of being one from the beginning. don't ask me how I don't know either Rimuru and ciel will also be with each other wayyy longer hence they become a bit 'EXTREMELY YANDERE ON EACH OTHER' uhmm a bit obsessive. also my first time writing a story + haven't read the light novel but kinda know the order and story to an extend + I'm a 6th grader so I don't know a lot of words I can use for my story to express my story BUT I hate spelling mistakes and will probably not make any but a few. I do not own the tensura series or light novel it belongs to fuze san(I think that's his name?) also if any one copies my story without my permission I WILL SEND YOU TO JESUS Taking inspiration is very much allowed
Whispers of Affection: The Milim and Rimuru Love Story (Rewriten ) by Friris
27 parts Ongoing Mature
Hello! This is the rewritten version of the story. In this updated version, there will be several changes, including adjustments to the relationship between Rimuru and Milim, and at some point, the story will diverge significantly from the original light novel. Please excuse any errors in my English, as it's not my first language. If you notice any inaccuracies, such as errors regarding the kingship of certain countries, please leave a comment, and I'll make sure to correct them. Thank you for your understanding and feedback! Additionally, I will be evolving Raphael into Ciel quite rapidly, but Rimuru will not be progressing from Demon Lord to True Dragon at the same pace.
TENSURA X ARIFURETA : Journeys by Diablo_Forever3000
14 parts Ongoing
Time line is set in 𝗔𝗙𝗧𝗘𝗥 𝗔𝗥𝗜𝗙𝗨𝗥𝗘𝗧𝗔 arc 𝗔𝘁 the 𝗘𝗻𝗱 of 𝗧𝗲𝗻𝘀𝘂𝗿𝗮 , When 𝐑𝐢𝐦𝐮𝐫𝐮 defeats Yukki and decides to go for a vacation. • This is an 𝐎𝐫𝐢𝐠𝐧𝐚𝐥 𝐅𝐚𝐧𝐟𝐢𝐜 . No CopyPaste-(ahem) Restart . •Except The images and Characters of Original Tensura and Arifureta. Everything in this fanfic is mine Idea . •Note : Neither Tensura nor Arifureta belongs to me . This is just a fanfic . Ranking #1 Kouki 8 April 2023 #1 Liliana 8 April 2023 #1 Shia 10 May 2023 #1 hajime. 15 July 2023 #1 Shizuku 11 Mar 2024 #1 Ciel 20 Mar 2024 (out of 6.83k stories) #1 Kaori. 30 Aug 2024 Other Rankings / Out of 1000+ Stories #5 chloeObell 8 Sept 2024 #10 Slime. 8 Sept 2024 #10 worldbuilding 8 Sept 2024 Long Run Rankings #1 kouki Since 2023 - 2 October 2024 Thanks for reading.. Hope u like it ..
The Void Dragon God [Discontinued] by Finnisop
17 parts Complete
This is the story of Rimuru Tempest, he was the strongest being that ever existed and the oldest. he was bored because he was the only one in the void so he created veldanava his little brother, after that due to unfortunate circumstances he has to go into a deep sleep. after he wakes up he finds himself in a strange cave. what will he do? and will everything be the same? I don't own any of the characters and tensura! ( The cover isn't mine)
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Slide 1 of 19
The ancient Demon Lord Rimuru cover
Rimuru back 3000 year as a Fifth True Dragon cover
Perfected Tempest cover
Tensura: Melting the Eternal Frost cover
Tensura - Beyond Expectations cover
Restart Everything [That time I got reincarnated as a slime] cover
Rimuru's boredom and his regrets(Time Travel) Tensei Shitara Slime Datten Ken cover
Rimuru The Void God In The Future Past cover
(Old ver. Discontinued) A Dream in the Faraway Past cover
The Destined One cover
The Last Regret - That Time I got reincarnated as slime cover
That Time I Got Reincarnated as a Slime Again? cover
That Time I got Reincarnated As A True Dragon cover
The Emergence of Shinsha: A Hidden Legacy cover
Tensura What If: Silver Timeline (Draft) cover
Rimuru the First Demon Lord cover
Whispers of Affection: The Milim and Rimuru Love Story (Rewriten ) cover
TENSURA X ARIFURETA : Journeys cover
The Void Dragon God [Discontinued] cover

The ancient Demon Lord Rimuru

26 parts Ongoing Mature

More than 200 years have passed since the war between the Empire and the victory over Ivarage. Rimuru is currently sitting in his office, bored out of his mind. His loyal partner Ciel sees his situation and gets an idea that can solve Rimuru's boredom. Come along on your journey as Rimuru travels over 20,000 years into the past to become an ancient demon lord.

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