That Time I Got Reincarnated as a Slime, Season 3, Pt. 1 - Uncut

As Demon Lord Rimuru expands his domain, his dream of a nation where humans and monsters can prosper together is almost realized. To celebrate and invite new citizens, a grand festival is thrown.

However, his new realm faces a threat when a fabricated war declaration draws the monster-hating cult of Luminism toward it for battle. Can Rimuru save his dream or will it be destroyed before it begins?