Sleuth

As an archetypal Sleuth, you excel at rooting out secrets and unraveling mysteries. You rely on your sharp senses, but also on your finely honed ability to read the words and actions of other creatures to discern their true nature. You excel at foiling plots of creatures that hide among the ordinary folk, and your mastery of lore and your quick wit make you well equipped to bring hidden evils into the light.

Bloodhound

Starting at 3rd level, you can use the bonus action granted by your Cunning Action to take the Search action. In addition, you gain proficiency in the Investigation and Insight skills if you don't already have it. Your proficiency bonus is doubled for any ability check you make that uses either of those proficiencies.

Predictive Fighting

At 3rd level, you gain the ability to decipher an opponent’s tactics and develop a counter to them. As a bonus action, you make a Wisdom (Insight) check against a creature you can see that isn’t incapacitated, contested by the target’s Charisma (Deception) check. If you succeed, you can use your Sneak Attack against that target even if you don't have advantage on the attack roll, but not if you have disadvantage on it.

This benefit lasts for 1 minute or until you successfully use this feature against a different target.

Steel Trap

Starting at 9th level, you have advantage on saving throws to resist having your memory altered, and you can accurately recall anything you have seen or heard within the past month. Additionally, other creatures can't benefit from advantage on Deception or Stealth checks against you while you are conscious.

Piercing Eye

At 13th level, your senses are almost impossible to foil. As an action, you gain truesight out to a range of 30 feet for 1 minute.

You can use this feature a number of times equal to your Wisdom modifier (minimum of once), and you regain all expended uses of it when you finish a long rest.

Deadly Analysis

At 17th level, you learn to exploit a creature’s weaknesses by carefully studying its tactics and movement. While your Predictive Fighting feature applies to a creature, your Sneak Attack damage against that creature increases by 3d6, and you can add your Intelligence modifier to damage rolls against them.