That Time I Got Reincarnated as a Slime (2018)

S2E17 The Eve of Battle

In a bid to thwart Clayman's schemes, Rimuru casts large-scale teleportation spells to relocate Tempest's forces to Eurazania while simultaneously bringing the citizens of Eurazania to safety in Tempest. Determined to confront Clayman directly, Rimuru plans to interrupt Walpurgis, the gathering of the Demon Lords. He takes Shion and Ranga for this pivotal encounter, as it serves as a rematch for Shion. Meanwhile, Tempest's military is mobilized and strengthened in anticipation of the impending clash with Clayman's army. The night before the battle has finally arrived...