Its just an idea pop in my mind for 2 days ago.

In a realm where shadows hold untold power and destiny weaves its enigmatic tapestry, join Cid Kagenou on an extraordinary journey in "Eminence in Shadow." Transported from our world to the captivating land of Azura, Cid discovers he is no ordinary bystander but the fabled Eminence in Shadow, a hero destined to change the course of this magical realm.

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)

in the void we could see the strongest fighters of the cardinal world facing off against 2 dragons. A firce battle considered as the fight among Gods(Capital G) In the middle of this Chao's there is an angel named Feldway contemplating and regretting his decisions seeing how it all scalated he persuaded the remaining survivors to send rimuru back in time. while this was happening he saw a glimpse of his master in rimuru making him want to serve him little did he know this wish will be granted later