Battle Assessment Feat 4
Source Pathfinder Core Rulebook
With careful observation during battle, you identify an enemy's strengths and weaknesses. The GM rolls a secret Perception check for you against the Deception or Stealth DC (whichever is higher) of an enemy of your choice who is not concealed from you, hidden from you, or undetected by you, and who is engaged in combat. The GM might apply a penalty for the distance between you and the enemy. The enemy is then temporarily immune to your Battle Assessment for 1 day.
Critical Success The GM chooses two of the following pieces of information about the enemy to tell you: which of the enemy's weaknesses is highest, which of the enemy's saving throws has the lowest modifier, one immunity the enemy has, or which of the enemy's resistances is highest. If the event of a tie, the GM should pick one at random.
Success The GM chooses one piece of information from the above list to tell you about the enemy.
Critical Failure The GM gives you false information (the GM makes up the information).
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.
RogueThis indicates abilities from the rogue class.
SecretThe GM rolls the check for this ability in secret.