Multiclass Characters

A character can add new classes as he or she progresses in level, thus becoming a multiclass character. The class abilities from a character's different classes combine to determine a multiclass character's overall abilities. Multiclassing improves a character's versatility at the expense of focus.

Class and Level Features: As a general rule, the abilities of a multiclass character are the sum of the abilities of each of the character's classes.

Level: "Character level" is a character's total number of levels. It is used to determine when feats and ability score boosts are gained.

"Class level" is a character's level in a particular class. For a character whose levels are all in the same class, character level and class level are the same.

Hit Points: A character gains hit points from each class as his or her class level increases, adding the new hit points to the previous total.

Base Attack Bonus: Adding a level in a class with a good BAB (fighter, ranger, paladin) adds +1; a level in a class with a medium BAB (bard, cleric, druid, monk, rogue) adds +0.75; a level in a class with a poor BAB (sorcerer, wizard) adds +0.5.

Fractions are rounded down when calculating BAB, though you still keep track of them. For example, a Rog 1/Ftr 1 has a BAB of +1.75 (rounded down to +1). If he gained a second level in rogue, it would become +2.5, or +2.

Saving Throws: Add the base save bonuses for each class together.

Optional: All classes add +0.5 to the class' good save(s) and +0.4 to the poor save(s). If the class has one or more good saves, you also add +2 to them. A level in a second class adds the same thing.
Exception: If the new class' high save(s) are different from the existing class's, add a one-time +2 bonus to the high save in addition to the standard +0.5. For example, a Rog 1 has Fort +0.4 (+0), Ref +2.5 (+2), Will +0.4 (+0). A second level of rogue adds +0.4 to his Fort and Will saves and +0.5 to his Ref save, thus: Fort +0.8 (+0), Ref +3.0 (+3), Will +0.8 (+0). If he took a level in ranger for his third character level, he wouldn't gain a +2 bonus to Reflex, since he's already received the +2 bonus, but he would still gain +0.5: Fort +1.3 (+1), Ref +3.5 (+3), Will +1.2 (+1).

Skills: If a skill is a class skill for any of the character's classes, he gains a one-time +3 bonus for that skill. The maximum rank for any skill is equal to character level.

Class Features: A multiclass character gets all the class features of all his or her classes but must also abide by the special restrictions of all his or her classes.

In the special case of turning undead, both clerics and experienced paladins have the same ability. If the character's paladin level is 4th or higher, her effective turning level is her cleric level plus her paladin level minus 3.

In the special case of uncanny dodge, experienced fighters, monks, and rogues have the same ability. When a such a character would gain uncanny dodge a second time (for her second class), she instead gains improved uncanny dodge, if she does not already have it. Her class levels in all applicable classes stack to determine the base attack bonus an attacker needs to flank her.

Feats: A multiclass character gains feats based on character levels, regardless of individual class level.

Ability Increases: A multiclass character gains ability score increases based on character level, regardless of individual class level.

Spells: The character gains spells from all of his or her spellcasting classes and keeps a separate spell list for each class. If a spell's effect is based on the class level of the caster, the player must keep track of which class's spell list the character is casting the spell from. See also Multiclass Spellcasters.

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