Rage

Rage gains +4 morale bonus to STR & CON, +2 morale bonus on Will saves. Takes a -2 penalty
to AC. Increase to CON grants 2 hit points per
Hit Dice while in rage. In rage, a barbarian
cannot use any Charisma-, Dexterity-, or Intelligence based skills (except Acrobatics, Fly, Intimidate, and Ride) or any ability that requires patience or concentration. A barbarian can end
rage as a free action and is fatigued for rounds
equal to 2 times the number of rounds spent
in the rage.