Multiclassing allows you to gain levels in multiple classes. Doing so lets you mix the abilities of those classes to realize a character concept that might not be reflected in one of the standard class options. With this rule, you have the option of gaining a level in a new class whenever you advance in level, instead of gaining a level in your current class. Your levels in all your classes are added together to determine your character level.
Multiclassing in Aurora
To qualify for a new class, you must meet the ability score prerequisites for both your current class and your new one.
Once you have selected your main class you can add a new class by going to the level up panel. At the bottom you will find the multiclassing section where you can choose to add a new multiclass. When you click the ‘New Multiclass’ button you can select your new class from the Class tab just as you did with you primary class.