Barbarian rage

Type of Feat: Class
Prerequisite: Barbarian
Specifics: The barbarian may rage, gaining a +4 morale bonus to Strength and Constitution and +2 to all Will saving throws, in exchange for a -2 penalty to AC. The barbarian may use this ability 1x/day at 1st level, +1/day at 4th level, and every 4 levels thereafter, extending into epic levels.
Use: Selected. At 15th level, the rage ability becomes Greater Rage, giving the barbarian +6 to Strength and Constitution and +3 to Will saves (the -2 penalty to AC still applies).