diff --git a/mods/ENVIRONMENT/mcl_weather/skycolor.lua b/mods/ENVIRONMENT/mcl_weather/skycolor.lua
index 6d9efd47a..edadbbeb8 100644
--- a/mods/ENVIRONMENT/mcl_weather/skycolor.lua
+++ b/mods/ENVIRONMENT/mcl_weather/skycolor.lua
@@ -120,20 +120,25 @@ mcl_weather.skycolor = {
 	override_day_night_ratio = function(player, ratio)
 		local meta = player:get_meta()
 		local has_night_vision = meta:get_int("night_vision") == 1
+		local has_darkness = meta:get_int("darkness") == 1
 		local is_visited_shepherd = meta:get_int("mcl_shepherd:special") == 1
 		local arg
-		-- Apply night vision only for dark sky
-		local is_dark = minetest.get_timeofday() > 0.8 or minetest.get_timeofday() < 0.2 or mcl_weather.state ~= "none"
-		local pos = player:get_pos()
-		local dim = mcl_worlds.pos_to_dimension(pos)
-		if (has_night_vision or is_visited_shepherd) and is_dark and dim ~= "nether" and dim ~= "end" then
-			if ratio == nil then
-				arg = NIGHT_VISION_RATIO
-			else
-				arg = math.max(ratio, NIGHT_VISION_RATIO)
-			end
+		if has_darkness and not is_visited_shepherd then
+			arg = 0
 		else
-			arg = ratio
+			-- Apply night vision only for dark sky
+			local is_dark = minetest.get_timeofday() > 0.8 or minetest.get_timeofday() < 0.2 or mcl_weather.state ~= "none"
+			local pos = player:get_pos()
+			local dim = mcl_worlds.pos_to_dimension(pos)
+			if (has_night_vision or is_visited_shepherd) and is_dark and dim ~= "nether" and dim ~= "end" then
+				if ratio == nil then
+					arg = NIGHT_VISION_RATIO
+				else
+					arg = math.max(ratio, NIGHT_VISION_RATIO)
+				end
+			else
+				arg = ratio
+			end
 		end
 		player:override_day_night_ratio(arg)
 	end,
diff --git a/mods/ITEMS/mcl_potions/functions.lua b/mods/ITEMS/mcl_potions/functions.lua
index afbbc2128..6a1d14a5f 100644
--- a/mods/ITEMS/mcl_potions/functions.lua
+++ b/mods/ITEMS/mcl_potions/functions.lua
@@ -406,6 +406,52 @@ mcl_potions.register_effect({
 	uses_factor = false,
 })
 
+mcl_potions.register_effect({
+	name = "darkness",
+	description = S("Darkness"),
+	get_tt = function(factor)
+		return S("surrounded by darkness")
+	end,
+	res_condition = function(object)
+		return (not object:is_player())
+	end,
+	on_start = function(object, factor)
+		object:get_meta():set_int("darkness", 1)
+		mcl_weather.skycolor.update_sky_color({object})
+		object:set_sky({fog = {
+			fog_distance = 10,
+		}})
+		EF.darkness[object].flash = 0.6
+	end,
+	on_step = function(dtime, object, factor, duration)
+		if object:get_meta():get_int("night_vision") ~= 1 then
+			local flash = EF.darkness[object].flash
+			if flash < 0.1 then EF.darkness[object].flashdir = true
+			elseif flash > 0.6 then EF.darkness[object].flashdir = false end
+			flash = EF.darkness[object].flashdir and (flash + dtime) or (flash - dtime)
+			object:set_sky({fog = {
+				fog_start = flash,
+			}})
+			EF.darkness[object].flash = flash
+		else
+			object:set_sky({fog = {
+				fog_start = 0.99,
+			}})
+		end
+		mcl_weather.skycolor.update_sky_color({object})
+	end,
+	on_end = function(object)
+		object:get_meta():set_int("darkness", 0)
+		mcl_weather.skycolor.update_sky_color({object})
+		object:set_sky({fog = {
+			fog_distance = -1,
+			fog_start = -1,
+		}})
+	end,
+	particle_color = "#000000",
+	uses_factor = false,
+})
+
 mcl_potions.register_effect({
 	name = "health_boost",
 	description = S("Health Boost"),