Spell Focus

Spell Focus

Type: General
Source: Player's Handbook v.3.5

Choose a school of magic, such as Illusion. Your spells of that school are more potent than normal.

Benefit: Add +1 to the Difficulty Class for all saving throws against spells from the school of magic you select to focus on.
Special: You can gain this feat multiple times. Its effects do not stack. Each time you take the feat it applies to a new school of magic.
Special: Warlocks may take this ability and apply it to either Invocations or Eldritch