Vanilla Usage Spawn Rules
- biome_filter
 - brightness_filter
 - delay_filter
 - density_limit
 - difficulty_filter
 - disallow_spawns_in_bubble
 - distance_filter
 - height_filter
 - herd
 - mob_event_filter
 - permute_type
 - player_in_village_filter
 - spawn_event
 - spawns_lava
 - spawns_on_block_filter
 - spawns_on_block_prevented_filter
 - spawns_on_surface
 - spawns_underground
 - spawns_underwater
 - weight
 - world_age_filter
 
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biome_filter 
Show
armadillo
"minecraft:biome_filter": {
    "test": "has_biome_tag",
    "value": "savanna"
}"minecraft:biome_filter": {
    "all_of": [
        {
            "test": "has_biome_tag",
            "value": "mesa"
        },
        {
            "test": "has_biome_tag",
            "operator": "not",
            "value": "plateau"
        }
    ]
}"minecraft:biome_filter": {
    "all_of": [
        {
            "test": "has_biome_tag",
            "value": "mesa"
        },
        {
            "test": "has_biome_tag",
            "value": "plateau"
        }
    ]
}axolotl
"minecraft:biome_filter": {
    "test": "has_biome_tag",
    "operator": "==",
    "value": "lush_caves"
}bat
"minecraft:biome_filter": {
    "any_of": [
        {
            "test": "has_biome_tag",
            "operator": "==",
            "value": "caves"
        },
        {
            "test": "has_biome_tag",
            "operator": "==",
            "value": "animal"
        }
    ]
}bee
"minecraft:biome_filter": [
    {
        "test": "has_biome_tag",
        "operator": "==",
        "value": "plains"
    },
    {
        "test": "has_biome_tag",
        "operator": "==",
        "value": "sunflower_plains"
    },
    {
        "test": "has_biome_tag",
        "operator": "==",
        "value": "flower_forest"
    }
]bogged
"minecraft:biome_filter": {
    "any_of": [
        {
            "test": "has_biome_tag",
            "operator": "==",
            "value": "swamp"
        },
        {
            "test": "has_biome_tag",
            "operator": "==",
            "value": "mangrove_swamp"
        }
    ]
}chicken
"minecraft:biome_filter": {
    "test": "has_biome_tag",
    "operator": "==",
    "value": "animal"
}brightness_filter 
Show
armadillo
"minecraft:brightness_filter": {
    "min": 7,
    "max": 15,
    "adjust_for_weather": false
}"minecraft:brightness_filter": {
    "min": 7,
    "max": 15,
    "adjust_for_weather": false
}"minecraft:brightness_filter": {
    "min": 7,
    "max": 15,
    "adjust_for_weather": false
}bat
"minecraft:brightness_filter": {
    "min": 0,
    "max": 4,
    "adjust_for_weather": true
}bee
"minecraft:brightness_filter": {
    "min": 7,
    "max": 15,
    "adjust_for_weather": false
}bogged
"minecraft:brightness_filter": {
    "min": 0,
    "max": 7,
    "adjust_for_weather": true
}chicken
"minecraft:brightness_filter": {
    "min": 7,
    "max": 15,
    "adjust_for_weather": false
}cow
"minecraft:brightness_filter": {
    "min": 7,
    "max": 15,
    "adjust_for_weather": false
}delay_filter 
Show
pillager_patrol
"minecraft:delay_filter": {
    "min": 600,
    "max": 660,
    "identifier": "minecraft:pillager_patrol_easy",
    "spawn_chance": 20
}"minecraft:delay_filter": {
    "min": 600,
    "max": 660,
    "identifier": "minecraft:pillager_patrol_normal",
    "spawn_chance": 20
}"minecraft:delay_filter": {
    "min": 600,
    "max": 660,
    "identifier": "minecraft:pillager_patrol_hard",
    "spawn_chance": 20
}density_limit 
Show
axolotl
"minecraft:density_limit": {
    "underground": 5
}bat
"minecraft:density_limit": {
    "surface": 5
}cod
"minecraft:density_limit": {
    "surface": 20
}creeper
"minecraft:density_limit": {
    "surface": 5
}dolphin
"minecraft:density_limit": {
    "surface": 5,
    "underground": 0
}drowned
"minecraft:density_limit": {
    "surface": 5
}"minecraft:density_limit": {
    "surface": 2
}"minecraft:density_limit": {
    "underground": 5
}difficulty_filter 
Show
bogged
"minecraft:difficulty_filter": {
    "min": "easy",
    "max": "hard"
}creeper
"minecraft:difficulty_filter": {
    "min": "easy",
    "max": "hard"
}drowned
"minecraft:difficulty_filter": {
    "min": "easy",
    "max": "hard"
}"minecraft:difficulty_filter": {
    "min": "easy",
    "max": "hard"
}"minecraft:difficulty_filter": {
    "min": "easy",
    "max": "hard"
}enderman
"minecraft:difficulty_filter": {
    "min": "easy",
    "max": "hard"
}"minecraft:difficulty_filter": {
    "min": "easy",
    "max": "hard"
}"minecraft:difficulty_filter": {
    "min": "easy",
    "max": "hard"
}disallow_spawns_in_bubble 
Show
axolotl
"minecraft:disallow_spawns_in_bubble": {}distance_filter 
Show
cod
"minecraft:distance_filter": {
    "min": 12,
    "max": 32
}pillager_patrol
"minecraft:distance_filter": {
    "min": 24,
    "max": 48
}"minecraft:distance_filter": {
    "min": 24,
    "max": 48
}"minecraft:distance_filter": {
    "min": 24,
    "max": 48
}pufferfish
"minecraft:distance_filter": {
    "min": 12,
    "max": 32
}salmon
"minecraft:distance_filter": {
    "min": 12,
    "max": 32
}"minecraft:distance_filter": {
    "min": 12,
    "max": 32
}tropicalfish
"minecraft:distance_filter": {
    "min": 12,
    "max": 32
}height_filter 
Show
cod
"minecraft:height_filter": {
    "min": 0,
    "max": 64
}dolphin
"minecraft:height_filter": {
    "min": 0,
    "max": 64
}glow_squid
"minecraft:height_filter": {
    "min": -64,
    "max": 30
}pufferfish
"minecraft:height_filter": {
    "min": 0,
    "max": 64
}salmon
"minecraft:height_filter": {
    "min": 0,
    "max": 64
}"minecraft:height_filter": {
    "min": 50,
    "max": 64
}stray
"minecraft:height_filter": {
    "min": 60,
    "max": 66
}tropicalfish
"minecraft:height_filter": {
    "min": 0,
    "max": 64
}herd 
Show
armadillo
"minecraft:herd": {
    "min_size": 2,
    "max_size": 3
}"minecraft:herd": {
    "min_size": 1,
    "max_size": 2
}"minecraft:herd": {
    "min_size": 1,
    "max_size": 2
}axolotl
"minecraft:herd": {
    "min_size": 4,
    "max_size": 6,
    "event": "minecraft:entity_born",
    "event_skip_count": 2
}bat
"minecraft:herd": {
    "min_size": 8,
    "max_size": 8
}bee
"minecraft:herd": {
    "min_size": 1,
    "max_size": 1
}bogged
"minecraft:herd": {
    "min_size": 1,
    "max_size": 2
}chicken
"minecraft:herd": {
    "min_size": 2,
    "max_size": 4
}mob_event_filter 
Show
pillager_patrol
"minecraft:mob_event_filter": {
    "event": "minecraft:pillager_patrols_event"
}"minecraft:mob_event_filter": {
    "event": "minecraft:pillager_patrols_event"
}"minecraft:mob_event_filter": {
    "event": "minecraft:pillager_patrols_event"
}permute_type 
Show
pillager_patrol
"minecraft:permute_type": [
    {
        "weight": 100,
        "entity_type": "minecraft:pillager<minecraft:spawn_as_patrol_follower>"
    }
]"minecraft:permute_type": [
    {
        "weight": 100,
        "entity_type": "minecraft:pillager<minecraft:spawn_as_patrol_follower>"
    }
]"minecraft:permute_type": [
    {
        "weight": 100,
        "entity_type": "minecraft:pillager<minecraft:spawn_as_patrol_follower>"
    }
]zombie
"minecraft:permute_type": [
    {
        "weight": 95
    },
    {
        "weight": 5,
        "entity_type": "minecraft:zombie_villager_v2"
    }
]player_in_village_filter 
Show
pillager_patrol
"minecraft:player_in_village_filter": {
    "distance": 48,
    "village_border_tolerance": 32
}"minecraft:player_in_village_filter": {
    "distance": 48,
    "village_border_tolerance": 32
}"minecraft:player_in_village_filter": {
    "distance": 48,
    "village_border_tolerance": 32
}spawn_event 
Show
stray
"minecraft:spawn_event": {
    "event": "change_to_skeleton"
}"minecraft:spawn_event": {
    "event": "change_to_skeleton"
}spawns_lava 
Show
strider
"minecraft:spawns_lava": {}spawns_on_block_filter 
Show
armadillo
"minecraft:spawns_on_block_filter": [
    {
        "name": "minecraft:grass_block"
    },
    {
        "name": "minecraft:red_sand"
    },
    {
        "name": "minecraft:coarse_dirt"
    },
    {
        "name": "minecraft:brown_terracotta"
    },
    {
        "name": "minecraft:hardened_clay"
    },
    {
        "name": "minecraft:orange_terracotta"
    },
    {
        "name": "minecraft:light_gray_terracotta"
    },
    {
        "name": "minecraft:red_terracotta"
    },
    {
        "name": "minecraft:white_terracotta"
    },
    {
        "name": "minecraft:yellow_terracotta"
    }
]"minecraft:spawns_on_block_filter": [
    {
        "name": "minecraft:grass_block"
    },
    {
        "name": "minecraft:red_sand"
    },
    {
        "name": "minecraft:coarse_dirt"
    },
    {
        "name": "minecraft:brown_terracotta"
    },
    {
        "name": "minecraft:hardened_clay"
    },
    {
        "name": "minecraft:orange_terracotta"
    },
    {
        "name": "minecraft:light_gray_terracotta"
    },
    {
        "name": "minecraft:red_terracotta"
    },
    {
        "name": "minecraft:white_terracotta"
    },
    {
        "name": "minecraft:yellow_terracotta"
    }
]"minecraft:spawns_on_block_filter": [
    {
        "name": "minecraft:grass_block"
    },
    {
        "name": "minecraft:red_sand"
    },
    {
        "name": "minecraft:coarse_dirt"
    },
    {
        "name": "minecraft:brown_terracotta"
    },
    {
        "name": "minecraft:hardened_clay"
    },
    {
        "name": "minecraft:orange_terracotta"
    },
    {
        "name": "minecraft:light_gray_terracotta"
    },
    {
        "name": "minecraft:red_terracotta"
    },
    {
        "name": "minecraft:white_terracotta"
    },
    {
        "name": "minecraft:yellow_terracotta"
    }
]axolotl
"minecraft:spawns_on_block_filter": "minecraft:clay"bat
"minecraft:spawns_on_block_filter": [
    "minecraft:stone",
    "minecraft:granite",
    "minecraft:diorite",
    "minecraft:andesite",
    "minecraft:tuff",
    "minecraft:deepslate"
]chicken
"minecraft:spawns_on_block_filter": "minecraft:grass_block"cow
"minecraft:spawns_on_block_filter": "minecraft:grass_block"donkey
"minecraft:spawns_on_block_filter": "minecraft:grass_block"spawns_on_block_prevented_filter 
Show
hoglin
"minecraft:spawns_on_block_prevented_filter": [
    "minecraft:nether_wart_block",
    "minecraft:shroomlight"
]magma_cube
"minecraft:spawns_on_block_prevented_filter": [
    "minecraft:nether_wart_block",
    "minecraft:shroomlight"
]"minecraft:spawns_on_block_prevented_filter": [
    "minecraft:nether_wart_block",
    "minecraft:shroomlight"
]piglin
"minecraft:spawns_on_block_prevented_filter": [
    "minecraft:nether_wart_block",
    "minecraft:shroomlight"
]"minecraft:spawns_on_block_prevented_filter": [
    "minecraft:nether_wart_block",
    "minecraft:shroomlight"
]skeleton
"minecraft:spawns_on_block_prevented_filter": [
    "minecraft:nether_wart_block",
    "minecraft:shroomlight"
]zombie_pigman
"minecraft:spawns_on_block_prevented_filter": [
    "minecraft:nether_wart_block",
    "minecraft:shroomlight"
]"minecraft:spawns_on_block_prevented_filter": [
    "minecraft:nether_wart_block",
    "minecraft:shroomlight"
]spawns_on_surface 
Show
armadillo
"minecraft:spawns_on_surface": {}"minecraft:spawns_on_surface": {}"minecraft:spawns_on_surface": {}bee
"minecraft:spawns_on_surface": {}bogged
"minecraft:spawns_on_surface": {}chicken
"minecraft:spawns_on_surface": {}cod
"minecraft:spawns_on_surface": {}cow
"minecraft:spawns_on_surface": {}spawns_underground 
Show
axolotl
"minecraft:spawns_underground": {}bat
"minecraft:spawns_underground": {}creeper
"minecraft:spawns_underground": {}drowned
"minecraft:spawns_underground": {}enderman
"minecraft:spawns_underground": {}"minecraft:spawns_underground": {}"minecraft:spawns_underground": {}ghast
"minecraft:spawns_underground": {}spawns_underwater 
Show
axolotl
"minecraft:spawns_underwater": {}cod
"minecraft:spawns_underwater": {}dolphin
"minecraft:spawns_underwater": {}drowned
"minecraft:spawns_underwater": {}"minecraft:spawns_underwater": {}"minecraft:spawns_underwater": {}glow_squid
"minecraft:spawns_underwater": {}guardian
"minecraft:spawns_underwater": {}weight 
Show
armadillo
"minecraft:weight": {
    "default": 10
}"minecraft:weight": {
    "default": 6,
    "rarity": 3
}"minecraft:weight": {
    "default": 6,
    "rarity": 2
}axolotl
"minecraft:weight": {
    "default": 10
}bat
"minecraft:weight": {
    "default": 10
}bee
"minecraft:weight": {
    "default": 10
}bogged
"minecraft:weight": {
    "default": 40
}chicken
"minecraft:weight": {
    "default": 10
}world_age_filter 
Show
pillager_patrol
"minecraft:world_age_filter": {
    "min": 6000
}"minecraft:world_age_filter": {
    "min": 6000
}"minecraft:world_age_filter": {
    "min": 6000
}