diff --git a/mods/mana/API.md b/mods/mana/API.md
new file mode 100644
index 00000000..c82eda1d
--- /dev/null
+++ b/mods/mana/API.md
@@ -0,0 +1,120 @@
+API documentation for Mana 1.0.1
+================================
+
+## Introduction
+The API of the Mana mod allows you to set and receive
+the current and maxiumum mana reserves of a player,
+and to subtract and add mana.
+
+## The basic rules
+For integrity reasons, this mod will ensure that the following assumptions
+are true at all times for all players:
+
+* Current and maximum mana can never be smaller than 0
+* The current value must not be greater than the maximum value
+* Only integer numbers are permitted for mana values
+
+It should be not possible to break these rules using this API alone.
+If you somehow manage to break one ofthe rules, please report a bug.
+
+If a real number is used as input for a value, it will be rounded
+(“round up half” rule).
+
+## Functions
+Of not specified otherwise, all functions return `nil`.
+`playername` always refers to the name of a player, as string.
+`value` always refers to a number and for most functions it must always be equal to or greater than 0.
+
+
+### `mana.set(playername, value)`
+Sets the mana reserve of the specified player to `value`.
+If `value` is smaller than 0, the mana will be set to 0.
+If `value` is greater than the maximum, the mana will be set to the maximum.
+
+
+### `mana.setmax(playername, value)`
+Sets the maximum of the player to `value`.
+
+If the new maximum would become smaller than the current value,
+the current value will automatically be set to
+the new maximum.
+
+### `mana.setregen(playername, value)`
+Sets the mana regeneration per mana tick of the player to `value`.
+Negative values are not permitted.
+The length of one “mana tick” is specified as the server-wide setting
+`mana_default_regen` in seconds.
+
+
+### `mana.get(playername)`
+Returns the current mana of the specified player as number.
+
+
+### `mana.getmax(playername)`
+Returns the current maximum mana of the specified player as number.
+
+
+### `mana.getregen(playername)`
+Returns the current mana regneration per mana tick of the specified
+player as number.
+The length of one “mana tick” is specified as the server-wide setting
+`mana_default_regen` in seconds.
+
+
+### `mana.add(playername, value)`
+Adds the specified non-negative amount of mana to the player, but only
+if the sum would not be greater than the maximum,
+
+#### Return value
+* `true` on success, all mana has been added
+* `false` on failure, no mana has been added
+
+
+### `mana.subtract(playername, value)`
+Subtracts the specified non-negative amount of mana from the player,
+but only if the player has sufficient mana reservers.
+
+#### Return value
+* `true` on success, all mana has been subtracted
+* `false` on failure, no mana has been subtraceed
+
+
+### `mana.add_up_to(playername, value)`
+Adds the specified non-negative amount of mana to the player, but it will
+be capped at the maximum. 
+
+#### Return value
+* `true, excess` on success, where `excess` is the amount of Mana which could not be added because it would have exceeded the maximum. `excess` equals `0` if all mana has been added
+* `false` on failure (mana could not be added)
+
+
+### `mana.subtract_up_to(playername, value)`
+Subtracts the specified non-negative amount of mana from the player, 
+but if the difference is smaller than 0, the mana will be set to 0.
+
+#### Return value
+* `true, missing` on success, where `missing` is the amount of Mana which could not be subtracted because it would have exceeded 0. `missing` equals `0` if all mana has been subtracted 
+* `false` on failure (mana could not be subtracted)
+
+
+## Appendix
+### General recommendations
+If you want your mod to be portable, it is recommended that you balance your mod in such a way that it assumes
+that every player starts with the following default mana values:
+
+* Max. mana: 200
+* Mana regeneration: 1 mana every 0.2 seconds
+
+Also assume that the max. mana never changes.
+This should (hopefully) ensure that multiple independent mana-using mods are more or less balanced when using
+the default settings.
+
+Also, to make life easier for subgame makers, define custom minetest.conf settings for your mod in order to
+overwrite the mana costs (and other relevant values) used by your mod. That way, subgame makers only have to edit
+minetest.conf, and not your mod.
+
+You do not have to bother about default values if you want to directly integrate your mod in a subgame and do
+not plan to release the mod independently.
+
+The best way to reliable balance the mana values used by several mods is to create a standalone subgame. It is
+highly recommended that you tweak the mana values of the mods to fit the subgame's needs.
diff --git a/mods/mana/README.txt b/mods/mana/README.txt
new file mode 100644
index 00000000..8f9ba0ce
--- /dev/null
+++ b/mods/mana/README.txt
@@ -0,0 +1,51 @@
+Mana mod [mana]
+===============
+Version: 1.0.1
+Note: This mod uses semantic versioning, as defined by version 2.0.0 of the SemVer standard.
+See: <http://semver.org/>
+
+Description
+===========
+This mod adds basic support for mana to Minetest.
+
+Each player will have an additional attribute: Mana. To be precise:
+
+- Current mana reserves: How much mana the player currently has
+- Maximum possible mana: How much mana the player can have at maximum
+- Mana regeneration amont: How much mana will be generated each “mana tick” (default 0.2 seconds)
+
+By default, each player spawns with 0/200 mana, and regenerates 1 mana per fifth of a second. All
+these values can be configured with the server settings (`minetest.conf`) and it is highly advised to do
+so if you plan to integrate this mod into a subgame.
+
+The mana regeneration rate (the “mana tick”) is a global setting and is *not* configured on a
+per-player basis.
+
+The mod provides a simple API to set, get, add and subtract the mana (and maximum) mana of any player, and
+for setting the regeneration amount. Note that this mod itself does *not* change the gameplay in a meaningful
+way. You should install other mods which use the Mana mod as a dependency.
+
+The API documentation is in the file API.md.
+
+If the mod “HUD bars” [hudbars] is installed, a blue bar will be added to the HUD showing the player's mana reserves.
+It currently only works with version 0.3.0 of this mod.
+
+Otherwise, the mana is just shown as text.
+
+Configuration
+=============
+
+This mod can be configured with minetest.conf! The following settings are accepted:
+
+* `mana_default_max`: Initial max. mana given to new players. Default: `200`. This value must be non-negative.
+* `mana_default_regen`: Initial regenerated mana per “mana tick”. Default: `1`. This value must be non-negative.
+* `mana_regen_timer`: The length of a “mana tick” in seconds. Each player will get his/her mana increased by the current
+  regen value per mana tick. Default: `0.2`. This value must be positive, also try to avoid very small values
+  as those could probably stress your machine a lot.
+
+
+License information
+===================
+* textures/mana_icon.png: CC-BY by Buch <http://opengameart.org/users/Buch>.
+* textures/mana_bar.png: WTFPL by Wuzzy.
+* Everything else: WTFPL.
diff --git a/mods/mana/depends.txt b/mods/mana/depends.txt
new file mode 100644
index 00000000..3e1d5c20
--- /dev/null
+++ b/mods/mana/depends.txt
@@ -0,0 +1 @@
+hudbars?
diff --git a/mods/mana/description.txt b/mods/mana/description.txt
new file mode 100644
index 00000000..e9efb088
--- /dev/null
+++ b/mods/mana/description.txt
@@ -0,0 +1 @@
+Adds a mana attribute to players, can be used as energy source for magical items, etc.
diff --git a/mods/mana/init.lua b/mods/mana/init.lua
new file mode 100644
index 00000000..dbadb4cc
--- /dev/null
+++ b/mods/mana/init.lua
@@ -0,0 +1,308 @@
+--[[
+Mana 1.0.1
+This mod adds mana to players, a special attribute
+
+License: WTFPL
+]]
+
+--[===[
+	Initialization
+]===]
+
+mana = {}
+mana.playerlist = {}
+
+mana.settings = {}
+mana.settings.default_max = 200
+mana.settings.default_regen = 1
+mana.settings.regen_timer = 0.2
+
+do
+	local default_max = tonumber(minetest.setting_get("mana_default_max"))
+	if default_max ~= nil then
+		mana.settings.default_max = default_max
+	end
+
+	local default_regen = tonumber(minetest.setting_get("mana_default_regen"))
+	if default_regen ~= nil then
+		mana.settings.default_regen = default_regen
+	end
+
+	local regen_timer = tonumber(minetest.setting_get("mana_regen_timer"))
+	if regen_timer ~= nil then
+		mana.settings.regen_timer = regen_timer
+	end
+end
+
+
+--[===[
+	API functions
+]===]
+
+function mana.set(playername, value) 
+	if value < 0 then
+		minetest.log("info", "[mana] Warning: mana.set was called with negative value!")
+		value = 0
+	end
+	value = mana.round(value)
+	if value > mana.playerlist[playername].maxmana then
+		value = mana.playerlist[playername].maxmana
+	end
+	if mana.playerlist[playername].mana ~= value then
+		mana.playerlist[playername].mana = value
+		mana.hud_update(playername)
+	end
+end
+
+function mana.setmax(playername, value)
+	if value < 0 then
+		value = 0
+		minetest.log("info", "[mana] Warning: mana.setmax was called with negative value!")
+	end
+	value = mana.round(value)
+	if mana.playerlist[playername].maxmana ~= value then
+		mana.playerlist[playername].maxmana = value
+		if(mana.playerlist[playername].mana > value) then
+			mana.playerlist[playername].mana = value
+		end
+		mana.hud_update(playername)
+	end
+end
+
+function mana.setregen(playername, value)
+	if value < 0 then
+		value = 0
+		minetest.log("info", "[mana] Warning: mana.setregen was called with negative value!")
+	end
+	value = mana.round(value)
+	mana.playerlist[playername].regen = value
+end
+
+function mana.get(playername)
+	return mana.playerlist[playername].mana
+end
+
+function mana.getmax(playername)
+	return mana.playerlist[playername].maxmana
+end
+
+function mana.getregen(playername)
+	return mana.playerlist[playername].regen
+end
+
+function mana.add_up_to(playername, value)
+	local t = mana.playerlist[playername]
+	value = mana.round(value)
+	if(t ~= nil and value >= 0) then
+		local excess
+		if((t.mana + value) > t.maxmana) then
+			excess = (t.mana + value) - t.maxmana
+			t.mana = t.maxmana
+		else
+			excess = 0
+			t.mana = t.mana + value
+		end
+		mana.hud_update(playername)
+		return true, excess
+	else
+		return false
+	end
+end
+
+function mana.add(playername, value)
+	local t = mana.playerlist[playername]
+	value = mana.round(value)
+	if(t ~= nil and ((t.mana + value) <= t.maxmana) and value >= 0) then
+		t.mana = t.mana + value 
+		mana.hud_update(playername)
+		return true
+	else
+		return false
+	end
+end
+
+function mana.subtract(playername, value)
+	local t = mana.playerlist[playername]
+	value = mana.round(value)
+	if(t ~= nil and t.mana >= value and value >= 0) then
+		t.mana = t.mana -value 
+		mana.hud_update(playername)
+		return true
+	else
+		return false
+	end
+end
+
+function mana.subtract_up_to(playername, value)
+	local t = mana.playerlist[playername]
+	value = mana.round(value)
+	if(t ~= nil and value >= 0) then
+		local missing
+		if((t.mana - value) < 0) then
+			missing = math.abs(t.mana - value)
+			t.mana = 0
+		else
+			missing = 0
+			t.mana = t.mana - value
+		end
+		mana.hud_update(playername)
+		return true, missing
+	else
+		return false
+	end
+end
+
+
+
+
+
+--[===[
+	File handling, loading data, saving data, setting up stuff for players.
+]===]
+
+
+-- Load the playerlist from a previous session, if available.
+do
+	local filepath = minetest.get_worldpath().."/mana.mt"
+	local file = io.open(filepath, "r")
+	if file then
+		minetest.log("action", "[mana] mana.mt opened.")
+		local string = file:read()
+		io.close(file)
+		if(string ~= nil) then
+			local savetable = minetest.deserialize(string)
+			mana.playerlist = savetable.playerlist
+			minetest.debug("[mana] mana.mt successfully read.")
+		end
+	end
+end
+
+function mana.save_to_file()
+	local savetable = {}
+	savetable.playerlist = mana.playerlist
+
+	local savestring = minetest.serialize(savetable)
+
+	local filepath = minetest.get_worldpath().."/mana.mt"
+	local file = io.open(filepath, "w")
+	if file then
+		file:write(savestring)
+		io.close(file)
+		minetest.log("action", "[mana] Wrote mana data into "..filepath..".")
+	else
+		minetest.log("error", "[mana] Failed to write mana data into "..filepath..".")
+	end
+end
+
+
+minetest.register_on_respawnplayer(function(player)
+	local playername = player:get_player_name()
+	mana.set(playername, 0)
+	mana.hud_update(playername)
+end)
+
+
+minetest.register_on_leaveplayer(function(player)
+	local playername = player:get_player_name()
+	mana.hud_remove(playername)
+	mana.playerlist[playername] = nil
+end)
+
+minetest.register_on_shutdown(function()
+	minetest.log("action", "[mana] Server shuts down. Rescuing data into mana.mt")
+	mana.save_to_file()
+end)
+
+minetest.register_on_joinplayer(function(player)
+	local playername = player:get_player_name()
+	
+	if mana.playerlist[playername] == nil then
+		mana.playerlist[playername] = {}
+		mana.playerlist[playername].mana = 0
+		mana.playerlist[playername].maxmana = mana.settings.default_max
+		mana.playerlist[playername].regen = mana.settings.default_regen
+	end
+
+	if minetest.get_modpath("hudbars") ~= nil then
+		hb.init_hudbar(player, "mana", mana.get(playername), mana.getmax(playername))
+	else
+		mana.hud_add(playername)
+	end
+end)
+
+
+--[===[
+	Mana regeneration
+]===]
+
+mana.regen_timer = 0
+
+minetest.register_globalstep(function(dtime)
+	mana.regen_timer = mana.regen_timer + dtime
+	if mana.regen_timer >= mana.settings.regen_timer then
+		local factor = math.floor(mana.regen_timer / mana.settings.regen_timer)
+		local players = minetest.get_connected_players()
+		for i=1, #players do
+			local name = players[i]:get_player_name()
+			if mana.playerlist[name] ~= nil then
+				if players[i]:get_hp() > 0 then
+					mana.add_up_to(name, mana.playerlist[name].regen * factor)
+				end
+			end
+		end
+		mana.regen_timer = mana.regen_timer % mana.settings.regen_timer
+	end
+end)
+
+--[===[
+	HUD functions
+]===]
+
+if minetest.get_modpath("hudbars") ~= nil then
+	hb.register_hudbar("mana", 0xFFFFFF, "Mana", { bar = "mana_bar.png", icon = "mana_icon.png" }, 0, mana.settings.default_max, false)
+
+	function mana.hud_update(playername)
+		local player = minetest.get_player_by_name(playername)
+		if player ~= nil then
+			hb.change_hudbar(player, "mana", mana.get(playername), mana.getmax(playername))
+		end
+	end
+
+else
+	function mana.manastring(playername)
+		return string.format("Mana: %d/%d", mana.get(playername), mana.getmax(playername))
+	end
+	
+	function mana.hud_add(playername)
+		local player = minetest.get_player_by_name(playername)
+		local id = player:hud_add({
+			hud_elem_type = "text",
+			position = { x = 0.5, y=0.9 },
+			text = mana.manastring(playername),
+			scale = { x = 0, y = 0 },
+			alignment = { x = 6.96, y = -14},
+			direction = 1,
+			number = 0xFFFFFF,
+			offset = { x = -200, y = 15}
+		})
+		mana.playerlist[playername].hudid = id
+		return id
+	end
+	
+	function mana.hud_update(playername)
+		local player = minetest.get_player_by_name(playername)
+		player:hud_change(mana.playerlist[playername].hudid, "number", mana.get(playername))
+	end
+	
+	function mana.hud_remove(playername)
+		local player = minetest.get_player_by_name(playername)
+		player:hud_remove(mana.playerlist[playername].hudid)
+	end
+end
+
+--[===[
+	Helper functions
+]===]
+mana.round = function(x)
+	return math.ceil(math.floor(x+0.5))
+end
diff --git a/mods/mana/textures/mana_bar.png b/mods/mana/textures/mana_bar.png
new file mode 100644
index 00000000..bb4faa33
Binary files /dev/null and b/mods/mana/textures/mana_bar.png differ
diff --git a/mods/mana/textures/mana_icon.png b/mods/mana/textures/mana_icon.png
new file mode 100644
index 00000000..d25ddff0
Binary files /dev/null and b/mods/mana/textures/mana_icon.png differ
diff --git a/worlds/minetestforfun/world.mt b/worlds/minetestforfun/world.mt
index 5cba5bad..1f453daf 100644
--- a/worlds/minetestforfun/world.mt
+++ b/worlds/minetestforfun/world.mt
@@ -57,7 +57,6 @@ load_mod_mesecons = true
 load_mod_mesecons_alias = true
 load_mod_mesecons_button = true
 load_mod_mesecons_commandblock = true
-load_mod_mesecons_compatibility = true
 load_mod_mesecons_delayer = true
 load_mod_mesecons_extrawires = true
 load_mod_mesecons_hydroturbine = true