That Time I Got Reincarnated as a Slime Novel Volume 10 is written by Fuse with illustrations by Mitz Vah.

The Tempest Founder's Festival was a roaring success, and Rimuru's next goal is to join the infamous Council of the West. However, a certain influential figure within the Council has no intention of letting someone as powerful as Rimuru have a seat at the table, and they will stop at nothing to quietly snuff him out before he makes any moves!