Rarity
Source Player Core pg. 11
Some elements of the game have a rarity to denote how often they’re encountered in the game world. Rarity primarily applies to equipment and magic items, but spells, feats, and other rules elements also have a rarity. If no rarity appears in the traits of an item, spell, or other game element, it’s of common rarity. Uncommon options are available only to those who have special training, grew up in a certain culture, or come from a particular part of the galaxy. This can be explained with an “Access” entry, explaining criteria for characters to choose it as a common option. Rare options are difficult to find and are usually given out only by the GM, while unique ones are literally one-of-a-kind in the game. The GM might alter the way rarity works or change the rarity of individual items to suit the story they want to tell.