The taste of blood.

Taste for Blood. You can easily (no skill check required) pick up the scent of any spilled blood that is no older than 2 weeks within 100 feet of you. 

Mind Meld. You can sense memories by tasting blood in the air. If an ally or enemy you can see bleeds, you can use a bonus action to extract one aspect of information (a name, a location, a damage vulnerability, a damage resistance, etc.).