Permanently disable skill

To permanently disable a feature in the game. We can add the following line of code in the “skill_types.xml” file. This line will make that ability only usable in the world we select.

<req type="world">green</req>


If we have our server in “red world” we will add “green world”.

In this way this ability will only be usable in a green world and our world, not being green, will not appear.
In my case I have disabled the interact ability. So that the missions of the npcs disappear forever.

<ability lvl="0" name="Interact" id="297">
    <duration const="">0</duration>
    <!-- entities are defined in quests_subjects.xml -->
        <req type="world">green</req>