Your spells of a certain element are more difficult to resist.
Choose one energy type (acid, cold, electricity, or fire). Add +1 to the Difficulty Class for all saving throws against spells that deal damage of the energy type you select.
You can gain this feat multiple times. Its effects do not stack. Each time you take this feat, it applies to a new energy type.
The text on this page is Open Game Content, and is licensed for public use under the terms of the Open Game License v1.0a.
Sources:
SECTION 15