Rules Index | GM Screen | Player's Guide

Chapter 3: Classes / Reading Class Entries

Key Ability

Source Core Rulebook pg. 67 2.0
This is the ability score that a member of your class cares about the most. Many of your most useful and powerful abilities are tied to this ability in some way.

For instance, this is the ability score you’ll use to determine the Difficulty Class (DC) associated with your character’s class features and feats. This is called your class DC. If your character is a member of a spellcasting class, this key ability is used to calculate spell DCs and similar values.

Most classes are associated with one key ability score, but some allow you to choose from two options. For instance, if you’re a fighter, you can choose either Strength or Dexterity as your key ability. A fighter who chooses Strength will excel in hand-to-hand combat, while those who choose Dexterity prefer ranged or finesse weapons.

Additionally, when you choose your character’s class, they gain an ability boost to their key ability score, increasing that ability score by 2. For more about ability boosts, see page 20.