Blazing Berserker

Type of Feat: General
Prerequisite: Barbarian Rage.
Specifics: When the barbarian enters his barbarian rage, his body becomes infused with fire energy. During rage, he gains gains immunity to fire, but has vulnerability to cold, which means he takes +50% damage from cold, regardless of whether a saving throw is allowed, or if the save is a success or failure.
Use: Automatic.