Manga Volume 15

 is the fifteenth volume of the manga adaptation of That Time I Got Reincarnated as a Slime. The special edition of this volume is bundled with an OAD.

Synopsis
RAISING THE DEAD

With the Falmuth army decimated, Rimuru's transformation into a Demon Lord finally begins. A successful evolution would mean unlocking new powers and a chance to resurrect the dead, but as Rimuru and his followers are forced into a deep sleep, the future is all but certain. Fortunately, the mysterious demon Rimuru summoned has every intention of seeing his master return as the slime he always was, no matter the cost...

Chapters

 * Chapter 68: Birth of a Demon Lord
 * Chapter 69: Tempest Revival Festival
 * Chapter 70: The Day of Eurazania's Fall
 * Chapter 65.5: Clover at Death's Door

Bonus Short Story:
 * Veldora's Slime Observation Journal