Creating Abilities for Classes

So I created a class and I want to create an ability that only my class I created can use. How do I do I do this? Also, the first two slots in my class say Empty Invalid Type!slot and I don't know how to fix this. Please help me.

In the XML data of the class you can change the ability slottype to anything that isn't used by another class. As for creating the ability itself you will need to code it, and add it in Player.UseItems.cs.

You will need to do some stuff in RABCDasm.