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Scouring Rage 
Feat 6
Source Pathfinder Advanced Player's Guide
Prerequisites an instinct that allows you to change your additional damage from Rage to a different damage type
Trigger You Rage.
You emit a powerful surge of instinctual energy when you unleash your potential. Each adjacent creature takes damage equal to your level (basic Fortitude save against your class DC) of the same type as your additional damage during that Rage.
Traits
Common
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
BarbarianThis indicates abilities from the barbarian class.