Extract Aspects

With this feat you can expend a bonus action to extract crucial information about your foe. Whenever you hit a single creature with one melee attack, you learn the creature's Damage Vulnerabilities, Damage Resistances, Damage Immunities, and Condition Immunities. Once you use this feature, you must finish a short or long rest before you can use it again. 

At 6th level, you can use this ability twice between rests, and at 17th level you can use it three times between rests. 

This feat also allows the player to increase their Dexterity or Strength Score by one when they choose this feat.