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転生したらスライムだった件 [Tensei Shitara Slime Datta Ken] (Novel) #18
That Time I Got Reincarnated as a Slime, Vol. 18
The seraphim army’s invasion under Michael’s command moves forward, and the Walpurgis Council is held for the eight demon lords of the Octagram to respond to the threat. Veldora’s eldest sister, the true dragon Velzard, has fallen into the enemy’s hands through Michael's skill Ultimate Dominion. Rimuru will need to deploy Tempest's military to various places if he hopes to rectify this situation...
388 pages, Kindle Edition
First published March 31, 2021
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Displaying 1 - 28 of 28 reviews
August 10, 2021
I had been reading the entire series for the past few weeks, and I would say that these novels had been executed quite good. The world building is the best. Too bad i catch up early, now Im hungry for more !!!
April 11, 2021
The tone and pace is so much more together and fun than in the short-compilation volume 17 :- D
However, every story from the previous volume is referenced and woven into the main thread in a significant manner :>
This is a fun prelude to the Great War between the angels and the devils (天魔大戦).
There are some pretty good twists and some head-scratching frustrations (culminating in a sort of artificial cliff-hanger, which is a standard technique :- p).
Well, here's to waiting until September for the next volume 🥂🍻
However, every story from the previous volume is referenced and woven into the main thread in a significant manner :>
This is a fun prelude to the Great War between the angels and the devils (天魔大戦).
There are some pretty good twists and some head-scratching frustrations (culminating in a sort of artificial cliff-hanger, which is a standard technique :- p).
Well, here's to waiting until September for the next volume 🥂🍻
May 28, 2026
Pretty aight Volume of slime i might say.
First of all world building is as good as always, even though it didn't quite reach the peak of volume 11, but i digress.
The main problem tho for me in this volume is the amount of unexplained plot thread that have been popping out towards the ending of the book, like how Jahil's suddenly already in footman's body? Like whatt? Aren't yuuki and kagali is the most cunning person out there? Why wouldn't they noticed it? Mind you Yuuki is the same guy who is cunning enough to break from michael's domination.
The angels here are also stupid imo. How is the almighty feldway and genius michael over here who's supposed to "never failed in planning for wars" FAILED TWICE BRUH, even Rimuru isn't present in those moment. I mean the first time maybe u can make the argument of Velgrynd's sudden reappearence, BUT WHY THO THEY DIDN'T ACCOUNT THE GUY WHO HAVE THE SKILL OF "ANTI SKILL" CAN BREAK THROUGH A DOMINATION / MIND CONTROL BASED SKILLS.
These 2 logical leaps in the biggest downer for me, especially counting Fuze's past cleverness in writting these kinda plot sequences, and just spell lazy writting.
But on the bright this volume shows many interesting dialogue between various factions of octa, angels, etc, many² new dynamics is introduced and they were written in a tidy way that actually expands the existing world here.
Overall would recommend it if you were a fan, but so many skipable parts here and logical leapa there so
3/5 stars aight rating.
First of all world building is as good as always, even though it didn't quite reach the peak of volume 11, but i digress.
The main problem tho for me in this volume is the amount of unexplained plot thread that have been popping out towards the ending of the book, like how Jahil's suddenly already in footman's body? Like whatt? Aren't yuuki and kagali is the most cunning person out there? Why wouldn't they noticed it? Mind you Yuuki is the same guy who is cunning enough to break from michael's domination.
The angels here are also stupid imo. How is the almighty feldway and genius michael over here who's supposed to "never failed in planning for wars" FAILED TWICE BRUH, even Rimuru isn't present in those moment. I mean the first time maybe u can make the argument of Velgrynd's sudden reappearence, BUT WHY THO THEY DIDN'T ACCOUNT THE GUY WHO HAVE THE SKILL OF "ANTI SKILL" CAN BREAK THROUGH A DOMINATION / MIND CONTROL BASED SKILLS.
These 2 logical leaps in the biggest downer for me, especially counting Fuze's past cleverness in writting these kinda plot sequences, and just spell lazy writting.
But on the bright this volume shows many interesting dialogue between various factions of octa, angels, etc, many² new dynamics is introduced and they were written in a tidy way that actually expands the existing world here.
Overall would recommend it if you were a fan, but so many skipable parts here and logical leapa there so
3/5 stars aight rating.
August 16, 2024
4/5 Volume 18 is definitely a step in the right direction after 17 which I’m still not convinced added much to the series. The first half of volume 18 is set up. Chapter 1 being the 2nd Walpurgis Council and all of the demon lords gathering to plan for war. Chapter 2 is Rimiru visiting all of the different nations. He leaves behind some of his defenders and a teleportation hub in each.
The 2nd half is the real story and the first assault of the war. A lot of time is spend with Kagali and the Moderate Jesters. Lots of back story is given and their characters get a lot of development. A lot of big battles going on and we end with a bit of a cliffhanger as the final arc continues.
The 2nd half is the real story and the first assault of the war. A lot of time is spend with Kagali and the Moderate Jesters. Lots of back story is given and their characters get a lot of development. A lot of big battles going on and we end with a bit of a cliffhanger as the final arc continues.
September 27, 2026
4/5 Good book. It is getting hard to recall all the names for all the characters after so long but I am getting buy. I have mixed feelings about another war so close to the previous one especially since this is the final arc. I feel like a calmer arc would have helped but there was an attempt. I just wish it was longer. I doubt Yuki would actually die but if that really is it for him then it was a good death. Onto the next one.
July 7, 2024
Great
I love this volume a lot. The scheming in this volume is great. I was shock in so many ways. I'm glad to see that the clowns have a history since the beginning of time. The belief in Rimuru has gotten to strong. This is only the beginning of the battle.
I love this volume a lot. The scheming in this volume is great. I was shock in so many ways. I'm glad to see that the clowns have a history since the beginning of time. The belief in Rimuru has gotten to strong. This is only the beginning of the battle.
October 14, 2024
It took me so long to get back into the swing of things. But I’m glad I got to finish this and I loved every bit of it
Truly stresses about Leon but I mean, I figured it was going to happen but never did I imagine any of the other things.
This story keeps me on my toes on to volume 19!
Truly stresses about Leon but I mean, I figured it was going to happen but never did I imagine any of the other things.
This story keeps me on my toes on to volume 19!
November 29, 2025
50/50 on progressing the story and comedic filler. main take away is the origin of the moderate jesters, and neat details that have been left unexplained until now. Funny moments with Diablo are always welcomed.
May 4, 2026
Erster Band, der Neuland für mich ist - der Reread war auch notwendig um alles einzuordnen und zu begreifen.
Das Ende hat mich irgendwie traurig gemacht - schließlich weiß ich nun nicht wie es nun um meine Lieblingsantagonisten steht, ich kann es kaum erwarten mit Band 19 weiterzumachen.
Das Ende hat mich irgendwie traurig gemacht - schließlich weiß ich nun nicht wie es nun um meine Lieblingsantagonisten steht, ich kann es kaum erwarten mit Band 19 weiterzumachen.
This entire review has been hidden because of spoilers.
August 7, 2021
Set up for the next big fight, rather boring to read through.
April 19, 2024
not bad
I dislike when Yuuki or the clowns are a main focus. Doesn’t make the it bad, it just lowers the rating for me.
I dislike when Yuuki or the clowns are a main focus. Doesn’t make the it bad, it just lowers the rating for me.
April 21, 2024
The build-up to kicking off the war between Micheal’s angelic forces and the remaining demon lords. It was pretty good but not much action.
April 22, 2024
after one and a half volume of just extras and side stories, it's great that we're finally back to the main story
May 5, 2024
So exciting
July 10, 2024
I'm kinda mad at rimuru... why he just sit there...
A volume with a lot of yapping and only a bit of shit actually happening but besides from chapter 2 it was pretty good
A volume with a lot of yapping and only a bit of shit actually happening but besides from chapter 2 it was pretty good
October 14, 2024
Simplemente emocionante
December 26, 2024
Inicia la guerra, pequeñas escaramuzas por varias partes, esta muy divertido de ver el inicio de la nueva guerra
January 22, 2025
I was really starting to like Yuuki’s group and then they all die?! I’m so sad I was really hoping that they would get a good end
This entire review has been hidden because of spoilers.
May 15, 2025
Dobby is free!
May 20, 2025
Damn a plot twist and a clifhanger.
i am so ready for the real fight now
i am so ready for the real fight now
June 27, 2025
That Ending!!!
Great volume. I still freaking love Diablo. That's my demon bias, but that ending. Y'all can't leave me hanging like that. I need the next volume NOW!!!
Great volume. I still freaking love Diablo. That's my demon bias, but that ending. Y'all can't leave me hanging like that. I need the next volume NOW!!!
July 20, 2025
3.5 stars
November 20, 2025
Whoa, this was probably my favorite chapter so far.
April 16, 2026
Mostly just a bunch of meetings and talking. They also travel to different places to do a lot more meetings and talking
June 17, 2026
love
This story just gets better and better. can’t wait to read the next one. What will happen next? Let good find out.
This story just gets better and better. can’t wait to read the next one. What will happen next? Let good find out.
August 29, 2026
Really good but there was a lot there and had to transition from the last arc into the next one
May 3, 2024
The start of the book was slow. A lot of build up happened to truly start the kick off to what is going to be one epic finale to this series. I cannot wait to see where the story goes next volume.
Displaying 1 - 28 of 28 reviews





















