Improved Favored Enemy
(Dungeon Master's Guide v.3.5, page 210, DnD 3.5)
[Epic]
Prerequisite
Five or more favored enemies
Benefit
Add +1 to the bonus on Bluff, Listen, Sense Motive, Spot, and Survival checks and damage rolls against all your favored enemies.
Special
This feat may be taken multiple times. Its effects stack.