diff --git a/mods/CORE/mcl_util/init.lua b/mods/CORE/mcl_util/init.lua
index 1f53feef7..36cbf2e63 100644
--- a/mods/CORE/mcl_util/init.lua
+++ b/mods/CORE/mcl_util/init.lua
@@ -48,6 +48,18 @@ function table.pairs_by_keys(t, f)
 	return iter
 end
 
+local function table.pull_random_items(table)
+	local count = #table
+	return function()
+		local idx = math.random(count)
+		local res = table[idx]
+		table[idx] = table[count]
+		table[count] = nil
+		count = count - 1
+		return res
+	end
+end
+
 local LOGGING_ON = minetest.settings:get_bool("mcl_logging_default", false)
 local LOG_MODULE = "[MCL2]"
 function mcl_util.mcl_log(message, module, bypass_default_logger)
diff --git a/mods/ENTITIES/mcl_mobs/spawning.lua b/mods/ENTITIES/mcl_mobs/spawning.lua
index 86c942be0..8a2e099cf 100644
--- a/mods/ENTITIES/mcl_mobs/spawning.lua
+++ b/mods/ENTITIES/mcl_mobs/spawning.lua
@@ -530,7 +530,7 @@ local function get_water_spawn(p)
 		end
 end
 
-local function has_room(self,pos)
+local function has_room(self, pos)
 	local cb = self.spawnbox or self.collisionbox
 	local nodes = {}
 	if self.fly_in then
@@ -543,16 +543,16 @@ local function has_room(self,pos)
 	end
 	table.insert(nodes,"air")
 
-	local p1 = vector.offset(pos,cb[1],cb[2] + 1,cb[3])
-	p1.x = math.floor(p1.x)
-	p1.y = math.floor(p1.y)
-	p1.z = math.floor(p1.z)
-
+	-- Calculate area to check for room
 	local cb_height = cb[5] - cb[2]
-	local p2 = vector.offset(p1,cb[4] - cb[1], cb_height, cb[6] - cb[3])
-	p2.x = math.ceil(p2.x) - 1
-	p2.y = math.ceil(p2.y) - 1
-	p2.z = math.ceil(p2.z) - 1
+	local p1 = vector.new(
+		math.round(pos.x + cb[1]),
+		pos.y,
+		math.round(pos.z + cb[3]))
+	local p2 = vector.new(
+		math.round(pos.x + cb[4]),
+		math.ceil(p1.y + cb_height) - 1,
+		math.round(pos.z + cb[6]))
 
 	-- Check if the entire spawn volume is free
 	local dx = p2.x - p1.x + 1
@@ -560,7 +560,23 @@ local function has_room(self,pos)
 	local dz = p2.z - p1.z + 1
 	local found_nodes = minetest.find_nodes_in_area(p1,p2,nodes) or 0
 	local n = #found_nodes
-	if n == ( dx * dy * dz ) then return true end
+	--[[
+	minetest.log(dump({
+		cb = cb,
+		pos = pos,
+		n = n,
+		dx = dx,
+		dy = dy,
+		dz = dz,
+		p1 = p1,
+		p2 = p2,
+		found_nodes = found_nodes,
+		nodes = nodes,
+	}))
+	]]
+	if n == ( dx * dy * dz ) then
+		return true
+	end
 
 	-- If we don't have an implementation of get_node_boxes, we can't check for sub-node space
 	if not minetest.get_node_boxes then return false end
@@ -699,10 +715,10 @@ function mcl_mobs.spawn(pos,id)
 	if not pos or not id then return false end
 	local def = minetest.registered_entities[id] or minetest.registered_entities["mobs_mc:"..id] or minetest.registered_entities["extra_mobs:"..id]
 	if not def or not def.is_mob or (def.can_spawn and not def.can_spawn(pos)) then return false end
+	if not has_room(def, pos) then return false end
 	return minetest.add_entity(pos, def.name)
 end
 
-
 local function spawn_group(p,mob,spawn_on,amount_to_spawn)
 	local nn= minetest.find_nodes_in_area_under_air(vector.offset(p,-5,-3,-5),vector.offset(p,5,3,5),spawn_on)
 	local o
diff --git a/mods/ENTITIES/mobs_mc/villager.lua b/mods/ENTITIES/mobs_mc/villager.lua
index 47b4cb470..76cf2715d 100644
--- a/mods/ENTITIES/mobs_mc/villager.lua
+++ b/mods/ENTITIES/mobs_mc/villager.lua
@@ -1049,14 +1049,18 @@ local function has_summon_participants(self)
 end
 
 local function summon_golem(self)
-	vector.offset(self.object:get_pos(),-10,-10,-10)
-	local nn = minetest.find_nodes_in_area_under_air(vector.offset(self.object:get_pos(),-10,-10,-10),vector.offset(self.object:get_pos(),10,10,10),{"group:solid","group:water"})
-	table.shuffle(nn)
-	for _,n in pairs(nn) do
-		local up = minetest.find_nodes_in_area(vector.offset(n,0,1,0),vector.offset(n,0,3,0),{"air"})
-		if up and #up >= 3 then
+	local pos = self.object:get_pos()
+	local p1 = vector.offset(pos, -10, -10, -10)
+	local p2 = vector.offset(pos,  10,  10,  10)
+	local nn = minetest.find_nodes_in_area_under_air(p1, p2,{"group:solid","group:water"})
+	for n in table.pull_random_items(nn) do
+		n.y = n.y + 1
+		minetest.log("trying to summon golem at "..vector.to_string(n))
+
+		local summon = mcl_mobs.spawn(n, "mobs_mc:iron_golem")
+		if summon then
 			minetest.sound_play("mcl_portals_open_end_portal", {pos=n, gain=0.5, max_hear_distance = 16}, true)
-			return minetest.add_entity(vector.offset(n,0,1,0),"mobs_mc:iron_golem")
+			return summon
 		end
 	end
 end
diff --git a/mods/ITEMS/mcl_mobspawners/init.lua b/mods/ITEMS/mcl_mobspawners/init.lua
index f2ee44ab1..13fc1010e 100644
--- a/mods/ITEMS/mcl_mobspawners/init.lua
+++ b/mods/ITEMS/mcl_mobspawners/init.lua
@@ -147,20 +147,14 @@ local function spawn_mobs(pos, elapsed)
 	-- get meta
 	local meta = minetest.get_meta(pos)
 
-	-- get settings
-	local mob = meta:get_string("Mob")
-	local mlig = meta:get_int("MinLight")
-	local xlig = meta:get_int("MaxLight")
-	local num = meta:get_int("MaxMobsInArea")
-	local pla = meta:get_int("PlayerDistance")
-	local yof = meta:get_int("YOffset")
-
 	-- if amount is 0 then do nothing
+	local num = meta:get_int("MaxMobsInArea")
 	if num == 0 then
 		return
 	end
 
 	-- are we spawning a registered mob?
+	local mob = meta:get_string("Mob")
 	if not mcl_mobs.spawning_mobs[mob] then
 		minetest.log("error", "[mcl_mobspawners] Mob Spawner: Mob doesn't exist: "..mob)
 		return
@@ -174,17 +168,14 @@ local function spawn_mobs(pos, elapsed)
 	local timer = minetest.get_node_timer(pos)
 
 	-- spawn mob if player detected and in range
+	local pla = meta:get_int("PlayerDistance")
 	if pla > 0 then
-
 		local in_range = 0
 		local objs = minetest.get_objects_inside_radius(pos, pla)
 
 		for _,oir in pairs(objs) do
-
 			if oir:is_player() then
-
 				in_range = 1
-
 				break
 			end
 		end
@@ -213,7 +204,6 @@ local function spawn_mobs(pos, elapsed)
 
 	-- count mob objects of same type in area
 	for k, obj in ipairs(objs) do
-
 		ent = obj:get_luaentity()
 
 		if ent and ent.name and ent.name == mob then
@@ -228,31 +218,28 @@ local function spawn_mobs(pos, elapsed)
 	end
 
 	-- find air blocks within 8×3×8 nodes of spawner
+	local yof = meta:get_int("YOffset")
 	local air = minetest.find_nodes_in_area(
 		{x = pos.x - 4, y = pos.y - 1 + yof, z = pos.z - 4},
 		{x = pos.x + 4, y = pos.y + 1 + yof, z = pos.z + 4},
 		{"air"})
 
-	-- spawn up to 4 mobs in random air blocks
+	-- spawn mobs in random air blocks. Default max of 4
 	if air then
-		local max = 4
-		if spawn_count_overrides[mob] then
-			max = spawn_count_overrides[mob]
-		end
-		for a=1, max do
-			if #air <= 0 then
-				-- We're out of space! Stop spawning
-				break
-			end
-			local air_index = math.random(#air)
-			local pos2 = air[air_index]
-			local lig = minetest.get_node_light(pos2) or 0
+		local num_to_spawn = spawn_count_overrides[mob] or 4
+		local mlig = meta:get_int("MinLight")
+		local xlig = meta:get_int("MaxLight")
 
-			pos2.y = pos2.y + 0.5
+		for pos2 = table.pull_random_items(air) do
+			local pos2 = air[air_index]
 
 			-- only if light levels are within range
+			local lig = minetest.get_node_light(pos2) or 0
 			if lig >= mlig and lig <= xlig then
-				minetest.add_entity(pos2, mob)
+				if mcl_mobs.spawn(pos2, mob) then
+					num_to_spawn = num_to_spawn - 1
+					if num_to_spawn == 0 then break end
+				end
 			end
 			table.remove(air, air_index)
 		end