Years of studying various species has made you extremely observant of the most subtle changes in a creature's disposition. In combat, this leads to keen insights into enemy types, weaknesses, and combat techniques.
As a Bonus Action, roll a die (see table below). If the result is 1, then you glean all the vital information about an opponent, and the "enemy type" becomes identified to you. This information can be shared with allies through normal means.
You deal double damage against identified targets as you utilise your knowledge of their weaknesses.
As combat progresses, you are able to study your opponents in further detail.
The die you roll is determined by your turn in combat:
1st turn = 1D20
2nd turn = 1D10
3rd turn = 1D6
4th+ turn = 1D4
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