That Time I Got Reincarnated as a Slime (2018)

S01E17 The Gathering

The Demon Lord Carrion dispatches Phobio, one of his Three Beastketeers, to launch an assault on Rimuru's city. However, Phobio is swiftly overpowered when Milim counters his attack. Following the confrontation, Rimuru and his team confront Phobio, inquiring about his purpose for visiting their town.