That Time I Got Reincarnated As A Slime Volume 17

As players of Monster Hunter and Dungeons & Dragons know, the slime is not exactly the king of the fantasy monsters. So when a 37-year-old Tokyo salaryman dies and wakes up in a world of elves and magic, he's a little disappointed to find he's become a blind, boneless slime monster.

A JOURNEY INTO HELL
 
Now that Rimuru has risen to the level of Demon Lord, the pinnacle of monsterkind, the powers of the world inevitably take notice. Foremost among them are the other Demon Lords, who call a meeting known as a Walpurgis, a space for these fearsome figures to hash out their differences. Though Rimuru secures an invitation to the event, he must tread carefully until he can distinguish friend from foe…