When picking [[Classes]], you are offered a primary and a secondary ability. Your primary is generally your strongest and most important ability as it gets the most upgrades from [[Sacrifices]]. [[Abilities]] have certain tags. These will be displayed in their descriptions and are mostly used by [[Equipment]] that buff abilities with those tags. It is possible to gain abilities outside your class, however, they often come at great cost and will not be able to be upgraded with [[Sacrifices]].