This demo creates a custom class named Gravity Wizard and gives it one skill, Gravity Bubble which is a passive skill that reduces gravity and increases jump force for the user. It will correctly activate and deactivate as the player learns / forgets it.
Currently, there is no class tome for Gravity Wizard so you must use either a save editor to set your class to Gravity Wizard or Unity Explorer to run PlayerStats.Apply_RequestClass("Gravity Wizard", 0)
This class is not meant to be used in actual gameplay, it is merely a demo of a full custom class with a passive ability. Please do not use this class on a character you care about. You are intended to use a debugging tool to explore it and see how it works. This class will almost certainly not work in multiplayer, but why would you want it to?