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

What if Rimuru was instead reborn as a primordial demon; the strongest in combat and intelligence. He reincarnated just before Star king dragon Veldanava created the omniverse; it was nothing but a void, his soul being exposed just a little to turn null made his soul undergo a change. Making him an individual with a high evolutionary potential