Manga Volume 8

 is the eighth volume of the manga adaptation of That Time I Got Reincarnated as a Slime.

Synopsis
THE BEAST AWAKENS

After his humiliating defeat at the hands of Milim, Demon Lord Carrion's follower Phobio seethes with anger. His negative emotions make him a perfect vessel for the legendary Charybdis, so Footman and Tear of the Moderate Harlequin Alliance pay Phobio a visit in the hopes of summoning the grand beast. Before long, Rimuru receives a report that Charybdis has indeed come to life, and is heading for Tempest. Where first there were just rumors of this conspiracy, now there's the telltale smoke of an approaching battle...

Chapters

 * Chapter 36: Dispatch from the Overseer
 * Chapter 37: Charybdis
 * Chapter 38: Tyrant of Destruction
 * Chapter 39: As a Nation

Bonus Short Story
 * Veldora's Slime Observation Journal: Big Catch