 Each battle won provides Experience points and also "Class Skill Points", which allow characters to permanently learn Skills from their current class.The player can then fill each character's Skill Slots with those permanently learned Skills, no matter what Class that character currently is, allowing (for instance) the item-wielding Gadgeteer to wield an Elementalist's magic spells and/or passive bonuses, or vice versa.The number of available Skill Slots increases with the character's level, allowing a wide variety of customization.