That Time I Got Reincarnated as a Slime: Season 2, Episode 17 - ProjectFreeTV

2 - 17: The Eve of Battle

The announcement of the upcoming event that will bring together several Demon Lords serves as part of the plan to face Clayman. But before that, Rimuru must find a way to save the people of Eurazania, who have become the target of a diabolical plot by Clayman.