Known Weaknesses Feat 1
Source Pathfinder Advanced Player's Guide
Whenever you Devise a Strategem, you can also attempt a check to Recall Knowledge as part of that action. If you critically succeed at the Recall Knowledge check, you notice a weakness and gain a +1 circumstance bonus to your attack roll from Devise a Stratagem.
If you immediately convey this information to your allies as part of the check, each ally gains a +1 circumstance bonus to their next attack roll against the subject, as long as their attack is made before the beginning of your next turn.
Effect: Known Weakness
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.
InvestigatorThis indicates abilities from the investigator class.