diff --git a/classes/dataholders/competenceholder.lua b/classes/dataholders/competenceholder.lua
new file mode 100644
index 0000000..bb95ee7
--- /dev/null
+++ b/classes/dataholders/competenceholder.lua
@@ -0,0 +1,57 @@
+local CompetenceHolder = Object:extend()
+local Competence = Object:extend()
+
+function Competence:new(name)
+    self.name = name;
+    self.base = 0;
+    self.lvl = 0;
+    self.bonus = 0;
+    self.add = 0;
+end
+
+function Competence:reduce(level)
+    return {
+        name = self.name,
+        value = self.base + (self.lvl * level) + self.bonus + self.add
+    }
+end
+
+function CompetenceHolder:new(key, datas)
+    self.key = key
+    self.datas = datas
+    self.list = {}
+end
+
+function CompetenceHolder:applyCommand(command, args)
+    if (command == "reset") then
+        self.list = {}
+        return
+    end
+    local competence = self:getCompetence(args[1])
+    if (command == "") then
+        competence.base = tonumber(args[2]) or 0
+    elseif (command == "add") then
+        competence.add = tonumber(args[2]) or 0
+    elseif (command == "bonus") then
+        competence.bonus = tonumber(args[2]) or 0
+    elseif (command == "lvl") then
+        competence.lvl = tonumber(args[2]) or 0
+    end
+end
+
+function CompetenceHolder:getCompetence(name)
+    if self.list[name] == nil then
+        self.list[name] = Competence(name)
+    end
+    return self.list[name]
+end
+
+function CompetenceHolder:reduce(level)
+    local list = {}
+    for key, value in pairs(self.list) do
+        table.insert(list, value:reduce(level))
+    end
+    return list
+end
+
+return CompetenceHolder
\ No newline at end of file
diff --git a/classes/dataholders/statholder.lua b/classes/dataholders/statholder.lua
index 6c6e9d9..62ad3f0 100644
--- a/classes/dataholders/statholder.lua
+++ b/classes/dataholders/statholder.lua
@@ -11,7 +11,7 @@ function StatHolder:applyCommand(command, args)
 end
 
 function StatHolder:reduce(level)
-    return self.commands.base + ((self.commands.level or 0) * level) + (self.commands.add or 0) + (self.commands.bonus or 0)
+    return self.commands.base + ((self.commands.lvl or 0) * level) + (self.commands.add or 0) + (self.commands.bonus or 0)
 end
 
 return StatHolder
\ No newline at end of file
diff --git a/classes/datalist.lua b/classes/datalist.lua
index bea511c..c372d58 100644
--- a/classes/datalist.lua
+++ b/classes/datalist.lua
@@ -4,6 +4,7 @@ local DataList = Object:extend()
 local ListHolder = require "classes.dataholders.listholder"
 local SimpleHolder = require "classes.dataholders.simpleholder"
 local StatHolder = require "classes.dataholders.statholder"
+local CompetenceHolder = require "classes.dataholders.competenceholder"
 
 function RawData.fromLine(line)
     line = utils.removeComment(line)
@@ -49,8 +50,10 @@ function RawData:getCommand()
 end
 
 function DataList.getHolder(key, value)
-    if (value.dataType == "comp" or value.dataType == "list") then
+    if (value.dataType == "list") then
         return ListHolder(key, value)
+    elseif (value.dataType == "comp") then
+        return CompetenceHolder(key, value)
     elseif (value.dataType == "stat") then
         return StatHolder(key, value)
     end
diff --git a/libs/commands.lua b/libs/commands.lua
index dea0408..90ec74d 100644
--- a/libs/commands.lua
+++ b/libs/commands.lua
@@ -20,6 +20,14 @@ local function addStatCommands(name, value)
     addCommands(name .. ".bonus", name, 0)
 end
 
+local function addCompCommands(name, value)
+    addCommands(name, name)
+    addCommands(name .. ".reset", name)
+    addCommands(name .. ".lvl", name)
+    addCommands(name .. ".add", name)
+    addCommands(name .. ".bonus", name)
+end
+
 local function addListCommands(name, value)
     addCommands(name, name)
     addCommands(name .. ".replace", name)
@@ -32,7 +40,7 @@ for key, value in pairs(struct) do
     elseif (value.dataType == "list") then
         addListCommands(key, value)
     elseif (value.dataType == "comp") then
-        addListCommands(key, value)
+        addCompCommands(key, value)
     else
         addCommands(key, key, value.default)
     end
@@ -45,7 +53,7 @@ end
 function functions.clean(args, command)
     local baseCommand = commands[command]
     if (baseCommand == nil) then
-        error("Command " .. baseCommand .. " doesn't exists")
+        error("Command " .. command .. " doesn't exists")
     end
     local commandData = struct[baseCommand]
     if (commandData.args == nil or commandData.args == 1) then