"How could this have happened?"
/Notice: Huge amount of energy detected. The explosion is going to destroy the entire universe/
"It is my fault"
/Notice: The explosion is going to take place in 10 minutes/
"I messed up. Everything is going to end because of me"
/Notice: Decide the course of action/
"Is there anything that can be done? Will this get reversed if I go back in time?"
/The bomb entity Zero-Nine is beyond the constraints of space and time. The explosion is going to happen even if we go back in time or in the future/
"That's bad"
/Notice: There is one possible solution to avoid destruction of the universe but.../
"What is it? Tell me at once! We don't have time"
/It is possible to subdue the impact if we use the high sealing magic to seal it all away but.../
"But?"
/According to my calculations it will require to sacrifice all the god level immortal being currently existing for it to be possible, including you master/ said Ciel with a sad voice.
"In other words?"
/All of you will either be petrified or sealed away permanently as a result. In case you are sealed, it would be highly unlikely you will ever be waking up again. It is impossible to conduct those calculations and your fate will be unknown/
"I see. It is still better than everything getting destroyed. I am sure everyone feels the same way. I accept"
/As you wish master. I will now proceed to conduct the sealing magic/
After taking the agreement from all the god level and immortal beings like Diablo, Benimaru, Guy, Milim etc etc, Ciel casted the sealing magic and sealed the bomb entity Zero-Nine away, permanently.
And so, one day, all the god entities vanished from the cardinal world. In their absence, the world turned into chaos. There was chaos and destruction everywhere. It took a few centuries for everything to finally get settled and the world started functioning normally.
The bomb entity Zero-Nine was now completely sealed and sated, so that problem had now been solved permanently. Even so, there was nothing that could have been done to bring back the gods of the ancient era back.
Thus time kept on flowing. Years passed, decades passed, centuries passed, millennia passed, tens of thousands of years passed.
Everyone that Rimuru had known in his lifetime, like the citizens of tempest, humans like Youm, and everyone else, died due to either war or passage of time. The map of the world got changed drastically due to the war and chaos, which led to many nations getting destroyed and new ones getting emerged. The world was now nothing like before.
Current year- 100,231-
"Its no use. I don't get it at all" said Mia.
"You will get it if you focus"
"I don't get it. Why do we have to do this anyway? Aren't we like, nobles or something? We can get anything we want with money anyway" said Mia, frustrated.
"Yeah that's true, but let's not forget that our family's reputation also depends on this. We need to achieve high rank or our family will get looked down on by other nobles" said Kay.
"Tch. Who even cares about those bastards"
"Hai hai, now get back to work"
Next day in school-
"Crimson Flare!"
"Wow What amazing fire magic! That's Ryzen san for you!"
"Of course. When it comes to fire magic, he is unbeatable"
"Mystic water"
"And there is the infamous water magic user Domini"
"Dark Lightning!"
"And the Lightning magic user Bolt"
"That's the class toppers for you. There is no way ordinary students like us are going to beat them in any way"
"Quiet down students! Now then, next up is, Mia. Your turn"
"Y-yes!"
*hmph*
"Here goes nothing. Wind magic, piercing blades!"
*chop*
"..."
"Alright. Next up is-"
"Aargh damn those kids! How dare they ignore the great wind magic I worked on the entire month!" cried Mia.
"Well. To be honest, it was kinda subpar when compared to the ones before" said Kay
"Et tu Kay! I didn't expect this from you! Waaaahhhhhhh"
"Hai hai now shut up. You are a pain in the ass"
"Savage. Brute. Heartless"
"Omg What would you take to shut for 5 minutes?"
"Umm let me see... Lets go to the ruins!"
"I knew you would say that. You know we are not supposed to go there right?"
"Soooo what? Its not like this will be the first time we break the rules?"
"I am not going"
"Well then, I am going to irritate you until you agree" said Mia with a sly smile
"Tch. Fine. I give up. But this will be the last time"
"Yay!"
"Yep. I am ready"
"Alright then, I will start casting the teleportation magic" said Kay.
"Hold up. What the hell are the two of you doing?" came a voice from behind.
"Uhhh What is Ryzen san doing here? This is bad"
"Hey there Ryzen! We are going to explore the ruins. Would you mind tagging along?" asked Mia.
"Sure"
"See? I told you we are going to get caught. Now what do we-... What did you say?!"
"I mean, I have always wanted to go there myself. And this looks like the best opportunity so why not?"
"..."
"Fine"
And so, the three of them teleported away.
"WHoooo! Its amazing!"
"Of course. Its one of the oldest ancient ruins of the world. According to the myths, this used to be the home of an ancient God some hundred thousand years ago" explained Kay.
"You sure are knowledgeable about everything" said Ryzen.
"Ah that's nothing Ryzen san"
With that, the three of them explored the ruins for another 5 hours, when they suddenly started to realize something was wrong.
"Hey Kay, do you feel, kinda weak?" said Mia while panting.
"Now that you mention it, I do. It feels like I have used up a lot more stamina than I thought" said Kay with shaking feet.
"This is weird. I don't believe we have expended that much energy" even Ryzen was surprised.
"Is this the curse of the ruin? Is the ruin punishing us for entering?" said Mia, frightened.
"I-I didn't actually believe in that shit till now, but now that this is happening"
"I see. We should get out of here as soon as possible" said Ryzen with a worried expression.
"Yeah"
*thud*
Suddenly Mia fell down, unconscious.
"Mia! NO! Is it already too late for us?"
"Let's hope not. I will carry her. You cast the teleportation magic" said Ryzen
"Alright"
"..."
"What's the matter?"
"I-its not working!"
"WHAT!"
"I-I did the incantation properly! This has never happened before!"
"Even I can't use magic! Don't tell me, are we somehow in an anti magic area right now?"
"I am frightened Ryzen san! Are we going to be alright?" said Kay with fear in his eyes.
Seeing this, Ryzen composed himself. If even he was to panic then there would be no hope left.
"Don't worry. We will find a way to get out of here"
"Am I awake again? How much time has passed?"
/It has been roughly a 100, 231 years, 5 months, 18 days, 22 hours, 8 minutes and 12 seconds since you were first sealed/
"Ah glad to know th- WHAT! its been that long already?!"
/Hai master/
"I see. And how was I able to get free now?"
/It looks like ever the time of all these centuries, the minute energy collected from the surroundings finally accumulated enough to break your seal. Though I must say I thought it would take at least 10,000 years more, if it would not have been for those kids/
"Those kids? Oh you mean the presences I feel outside?"
/Yes master/
"Well then, I should at least greet them myself. Cast an anti magic area just to be on the safe side"
/Hai master/
"W-who are you?" asked Ryzen in shock upon seeing a mysterious figure appear in front of him.
"I see you don't know me. Looks like I have been forgotten in the passage of time. Hi there. My name is Rimuru Tempest, and I am a good slime!"
Author's note: As always, share your reviews in the comments.