Tensei shitara Slime Datta Ken 4th Season

Demon Lord Rimuru moves closer to fulfilling his dream of forming an alliance between humans and monsters. As it started to get worse, Granville Rozzo and his granddaughter Maribel stood against Rimuru and were determined to protect humanity by placing it under their control. At the same time, Demon Lord Leon pursues his ambitions in El Dorado, while the emergence of a new hero approaches.