Your character’s Class helps define your role in fiction and combat. To that end, each class has a list of class abilities to take once per level. Abilities usually extend your base skills in new and powerful ways. Some are always active, meaning you gain their benefit all the time, without having to roll.
To use a class ability, roll for the skill listed in parentheses. If you succeed, the class ability’s text comes into effect. Missing or failing has the same consequences as if you were using the base skill. Normal penalties such as requiring an item, or rolling -1 for every point of armor, remain.
There are two options for taking more than one class:
Balanced: Declare a primary class and secondary class. On odd levels, take abilities from your primary, and on even levels, take abilities from your secondary.Pick one of your classes, and use that class to calculate starting EFF and the other one to calculate Hit Points.
Specialized: Declare a primary class and a secondary class. Take abilities from your primary at every level. Once per level, you can spend 5+level XP and take an ability from your secondary class. Pick one of your classes, and use that class to calculate starting EFF and the other one to calculate Hit Points.