You can now choose to instantly learn any skill you wish, provided you’d be able to learn, use, and understand it otherwise. You can utilize this for example to master Karate but won’t be able to master Earthbending, unless you possess the ability to Earthbend on your own. Any skills that would require muscle memory will be granted through this, and any skill or muscle memory that you need to forget and revert for any reason can be done so at will.