yl_spawnit/mobs_monster.lua

local BASE_CHANCE = 300  -- one every 5 minutes
local BASE_CHANCE_RATIO = 6000 -- dirt monster

local DAWN = 4500 / 24000
local DUSK = 19500 / 24000

spawnit.register({
	entity_name = "mobs_monster:dirt_monster",
	on = {"group:soil"},
	chance = BASE_CHANCE * 6000 / BASE_CHANCE_RATIO,
	min_y = 0,
	max_light = 7,
	min_time_of_day = DUSK,
	max_time_of_day = DAWN,
	max_in_area = 2,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:dungeon_master",
	chance = BASE_CHANCE * 9000 / BASE_CHANCE_RATIO,
	max_y = -70,
	max_light = 5,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

if yl_spawnit.has.nether and nether.DEPTH_FLOOR > -70 then
	spawnit.register({
		entity_name = "mobs_monster:dungeon_master",
		chance = 300,
		min_y = nether.DEPTH_FLOOR,
		max_y = nether.DEPTH_CEILING,
		max_light = 5,
		max_in_area = 1,
		min_player_distance = 12,
		spawn_in_protected = false,
	})
end

spawnit.register({
	entity_name = "mobs_monster:fire_spirit",
	on = {"default:obsidian", "caverealms:hot_cobble"},
	near = {"group:fire"},
	chance = BASE_CHANCE * 1500 / BASE_CHANCE_RATIO,
	max_y = -150,
	min_light = 12,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:land_guard",
	on = {
                "default:snow", "default:ice", "default:stone",
                "default:dry_dirt_with_dry_grass", "ethereal:dry_dirt"
        },
	chance = BASE_CHANCE * 25000 / BASE_CHANCE_RATIO,
	min_y = 0,
	max_light = 7,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:lava_flan",
	within = {"default:lava_source"},
	on = { "any" },
	chance = BASE_CHANCE * 1500 / BASE_CHANCE_RATIO,
	max_y = 0,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:mese_monster",
	on = { "any" },
	near = { "default:mese", "default:stone_with_mese"},
	chance = BASE_CHANCE * 5000 / BASE_CHANCE_RATIO,
	max_y = -20,
	max_light = 7,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:oerkki",
	on = { "group:cracky", "group:crumbly" },
	chance = BASE_CHANCE * 6000 / BASE_CHANCE_RATIO,
	max_y = -10,
	max_light = 6,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:oerkki",
	on = { "group:cracky", "group:crumbly" },
	chance = BASE_CHANCE * 3000 / BASE_CHANCE_RATIO,
	max_y = -10000,
	max_light = 6,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:oerkki",
	on = { "group:cracky", "group:crumbly" },
	chance = BASE_CHANCE * 1000 / BASE_CHANCE_RATIO,
	max_y = -25000,
	max_light = 6,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:sand_monster",
	on = {"default:desert_sand"},
	chance = BASE_CHANCE * 7000 / BASE_CHANCE_RATIO,
	min_y = 0,
	max_light = 7,
	max_in_area = 2,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:spider",
	on = {"default:dirt_with_rainforest_litter", "default:snowblock",
                        "default:snow", "ethereal:crystal_dirt", "ethereal:cold_dirt"},
	chance = BASE_CHANCE * 7000 / BASE_CHANCE_RATIO,
	min_y = 25,
	max_light = 8,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:spider",
	chance = BASE_CHANCE * 7000 / BASE_CHANCE_RATIO,
	max_y = -40,
	max_light = 7,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:stone_monster",
	chance = BASE_CHANCE * 7000 / BASE_CHANCE_RATIO,
	on = {"default:stone", "default:desert_stone", "default:sandstone"},
	max_y = 0,
	max_light = 7,
	max_in_area = 1,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:tree_monster",
	chance = BASE_CHANCE * 7000 / BASE_CHANCE_RATIO,
	on = {"group:soil"},
	near = {"group:tree", "group:leaves"},
	min_y = 0,
	max_y = 5000,
	max_light = 6,
	max_in_area = 1,
	min_time_of_day = DUSK,
	max_time_of_day = DAWN,
	min_player_distance = 12,
	spawn_in_protected = false,
})

spawnit.register({
	entity_name = "mobs_monster:tree_monster",
	chance = BASE_CHANCE * 7000 / BASE_CHANCE_RATIO,
	on = {"group:leaves"},
	min_y = 0,
	max_light = 7,
	max_in_area = 1,
	min_time_of_day = DUSK,
	max_time_of_day = DAWN,
	min_player_distance = 12,
	spawn_in_protected = false,
})