Blind-Fight Feat 8
Source Pathfinder Advanced Player's Guide
Prerequisites master in Perception
Your battle insights make you more aware of concealed and invisible opponents. You don't need to succeed at a flat check to target Concealed creatures.
You're not Flat-Footed to creatures that are Hidden from you (unless you're flat-footed to them for reasons other than the hidden condition), and you need only a successful DC 5 flat to target a hidden creature.
While you're adjacent to an Undetected creature of your level or lower, it is instead only hidden from you.
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.
FighterThis indicates abilities from the fighter class.
InvestigatorThis indicates abilities from the investigator class.
RangerThis indicates abilities from the ranger class.
RogueThis indicates abilities from the rogue class.