Demon Lord Attack

Demon Lord Attack (魔王来襲編) is the third volume of the That Time I Got Reincarnated as a Slime Light Novel.

Synopsis
TIMES ARE CHANGING FOR THE WORLD'S FIRST MONSTER TOWN!

After a furious battle with the orc lord, peace has once again returned to the Forest of Jura. Rimuru may be heading up the Great Forest of Jura Alliance, but he's most worried about finishing his town...until a visit from King Gazel Dwargo of the dwarves turns everything upside down! Not only that, but Rimuru is about to have a run-in with Milim Nava, an exceptionally dangerous demon lord known as the "Destroyer." What's a slime to do?!

Chapters

 * Prologue: The Demon Lord Summit
 * Chapter 1: The Name of a Nation
 * Chapter 2: The Demon Lord Invades
 * Chapter 3: The Congregation
 * Chapter 4: The Advancing Malice
 * Chapter 5: Charybdis
 * Epilogue: A New Artifice

Adaptations
This volume was adapted into the following material:

Manga:
 * Manga Volume 6
 * Chapter 28: Attention on the Town of Monsters
 * Chapter 29: Demon Lord Council
 * Chapter 30: A Place of Rest
 * Chapter 31: Milim the Whirlwind (Part 1)
 * Manga Volume 7
 * Chapter 32: Milim the Whirlwind (Part 2)
 * Chapter 33: The Demon Lords' Plot
 * Chapter 34: Visitors to the Land of Monsters
 * Chapter 35: Youm: From Chump to Champ
 * Manga Volume 8
 * Chapter 36: Dispatch from the Overseer
 * Chapter 37: Charybdis
 * Chapter 38: Tyrant of Destruction
 * Chapter 39: As a Nation

Anime:
 * Episode 15: The Jura Forest Alliance
 * Episode 16: Demon Lord Milim Attacks
 * Episode 17: The Gathering
 * Episode 18: Evil Creeps Closer
 * Episode 19: Charybdis
 * Episode 20: Yuuki Kagurazaka