That Time I Got Reincarnated as a Slime episode 17

It aired on Tuesday, 29 January 2019.

The Gathering

The Demon Lord Carrion has sent one of his Three Beastketeers, Phobio, on a raid of Rimuru's city. However, Phobio is quickly defeated when Milim meets his attack with her own. Rimuru and his subordinates then ask Phobio why he has come to their town.