Rimuru One shot/Short story/Reaction remake

Remake... Nothing more, character don't belong to me beside the occ Like before story about Rimuru and his adventure, different race and scenario. I'll also change the story a little and correct some small spelling mistake. By the way none of the manga/anime/Ln and more are mine but to their respective author.

Ancient Demon Lord Rimuru

It's been millennia since the end of the great tenma war many have happened since that day. And now I've been slacking off lately seen my mortal enemy paperworks give up on me. And now I've been battling the strongest energy of my life that not even the whole octagram can defeat which is BOREDOM!!! BUT ATAS!!! my eter...