diff --git a/README.md b/README.md
index c42b947..fda93ef 100644
--- a/README.md
+++ b/README.md
@@ -1,23 +1,21 @@
 #The Armor Monoid
 
-This mod provides a monoidal_effects monoid for handling armor groups. It
-provides the ```"armor"``` monoid, and a way to register new damage types
+This mod provides a player_monoids monoid for handling armor groups. It
+provides a monoid for damage resistance, and a way to register new damage types
 for players. It is also compatible with 3d_armor.
 
 Using the monoid
 ================
 The values in the monoid are tables mapping armor group names to damage
-multipliers. For example, if I wanted to register an effect granting arcane
+multipliers. For example, if I wanted to apply an effect granting arcane
 damage resistance but fleshy damage vulnerability, I could do <br/>
 ```
-monoidal_effects.register_effect_type("magic_barrier", {
-  disp_name = "Magic Barrier",
-  tags = { magical = 1 },
-  monoids = { armor = true },
-  cancel_on_death = true,
-  values = { armor = { fleshy = 1.5, arcane = 0.3 } },
-  icon = "magic_barrier.png",
-})
+local tab = {
+  arcane = 50,
+  fleshy = 150,
+}
+
+armor_monoid.monoid:add_change(player, tab, "mymod:arcane_boost")
 ```
 
 Registering damage types
diff --git a/depends.txt b/depends.txt
index f9e8fba..072e595 100644
--- a/depends.txt
+++ b/depends.txt
@@ -1,2 +1,2 @@
-monoidal_effects
+player_monoids
 3d_armor?
diff --git a/description.txt b/description.txt
index f7e4a0a..d0eee6f 100644
--- a/description.txt
+++ b/description.txt
@@ -1 +1 @@
-A monoidal_effects monoid for armor
+A player_monoids monoid for armor
diff --git a/init.lua b/init.lua
index ad695f2..fd78d66 100644
--- a/init.lua
+++ b/init.lua
@@ -22,7 +22,7 @@ end
 -- For example { fleshy = 0.5, fire = 1.2 } would mean that a player takes
 -- half fleshy damage and 120% fire damage. Nil values are the same as putting
 -- 1. The final multipliers are multiplied to the base damage for the group.
-monoidal_effects.register_monoid("armor", {
+armor_monoid.monoid = player_monoids.make_monoid({
 	combine = function(tab1, tab2)
 		local res = {}
 		
@@ -101,25 +101,6 @@ end
 if not minetest.global_exists("armor") then return end
 
 
-monoidal_effects.register_type("armor_monoid:compat_armor", {
-	disp_name = "3D Armor Compatibility",
-	dynamic = true,
-	monoids = { armor = true },
-	hidden = true,
-	cancel_on_death = false,
-	values = { armor = {} },
-})
-
-monoidal_effects.register_type("armor_monoid:compat_phys", {
-	disp_name = "3D Armor Physics Compatibility",
-	dynamic = true,
-	monoids = { speed = true, jump = true, gravity = true },
-	hidden = true,
-	cancel_on_death = false,
-	values = { speed = 1, jump = 1, gravity = 1 },
-})
-
-
 -- Armor override
 armor.set_player_armor = function(self, player)
 	local name, player_inv = armor:get_valid_player(player, "[set_player_armor]")
@@ -196,13 +177,19 @@ armor.set_player_armor = function(self, player)
 		armor_groups.fleshy = 100 - armor_level
 	end
 
-	monoidal_effects.cancel_effect_type("armor_monoid:compat_armor", name)
-	monoidal_effects.cancel_effect_type("armor_monoid:compat_phys", name)
+	armor_monoid.monoid:del_change(player, "armor_monoid:compat")
+	player_monoids.speed:del_change(player, "armor_monoid:compat")
+	player_monoids.jump:del_change(player, "armor_monoid:compat")
+	player_monoids.gravity:del_change(player, "armor_monoid:compat")
 	
-	monoidal_effects.apply_effect("armor_monoid:compat_armor", "perm", name, {
-		armor = { fleshy = armor_groups.fleshy / 100 },
-	})
-	monoidal_effects.apply_effect("armor_monoid:compat_phys", "perm", name, physics_o)
+	armor_monoid.add_change(player, { fleshy = armor_groups.fleshy / 100 },
+		"armor_monoid:compat")
+	player_monoids.speed:add_change(player, physics_o.speed,
+		"armor_monoid:compat")
+	player_monoids.jump:add_change(player, physics_o.jump,
+		"armor_monoid:compat")
+	player_monoids.gravity:add_change(player, physics_o.gravity,
+		"armor_monoid:compat")
 
 	self.textures[name].armor = armor_texture
 	self.textures[name].preview = preview