The Different Abilities
Each describe an apsect of your characters abilities, and affects his or her actions.
Should an ability score change during the game, all attributes derived from that score change accordingly. This includes hitpoints, as well as skill points.
Lack of abilities
Some creatures lack certain ability scores. This is not the same as having a score of 0 (zero). Lacking an ability scores equals a modifier of +0
Generating ability scores
3d6 vs. "4d6 keep 3"
Abilities and Spellcasters
The ability that governs bonus spells depends on what type of spellcaster your character is: Intelligence for wizards; Wisdom for clerics, druids, paladins, and rangers; or Charisma for sorcerers and bards. In addition to having a high ability score, a spellcaster must be of high enough class level to be able to cast spells of a given spell level. (See the class descriptions for details.)
Each ability, after changes made because of race, has a modifier ranging from –5 to +5. Table: Ability Modifiers and Bonus Spells shows the modifier for each score. It also shows bonus spells, which you’ll need to know about if your character is a spellcaster.
The modifier is the number you apply to the die roll when your character tries to do something related to that ability. You also use the modifier with some numbers that aren’t die rolls. A positive modifier is called a bonus, and a negative modifier is called a penalty.
|Score||Modifier||Bonus Spells (by Spell Level)|
|1||–5||Can’t cast spells tied to this ability|
|2–3||–4||Can’t cast spells tied to this ability|
|4–5||–3||Can’t cast spells tied to this ability|
|6–7||–2||Can’t cast spells tied to this ability|
|8–9||–1||Can’t cast spells tied to this ability|
|etc. . .|