Supernatural Senses Feat 4
Source Pathfinder Advanced Player's Guide
Prerequisites Acute Scent or precise or imprecise scent
Your scent is preternaturally sharp, and you can always rely on your sense of smell to help guide you when your vision is compromised. When you target a Concealed or Hidden opponent while you are raging, you reduce the DC of the flat check to 3 for a concealed target or to 9 for a hidden one.
Traits
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.
RageYou must be raging to use abilities with the rage trait, and they end automatically when you stop raging.