SpawnEntry ( name: "April Fools Tundra Forest", note: "April Fools NPCs", rules: [ Pack( groups: [ (3, (3, 6, "common.entity.calendar.april_fools.aggressive.trickster")), ], spawn_mode: Land, calendar_events: Some([AprilFools]), day_period: [Night, Morning, Noon, Evening], ), ], )