Thanks to your elf blood, you have superior vision in dark and dim conditions.
You have advantage on saving throws against being charmed, and magic can't put you to sleep.
You are in frequent contact with people in the segment of society that your chosen quarries move through. These people might be associated with the criminal underworld, the rough-and-tumble folk of the streets, or members of high society. This connection comes in the form of a contact in any city you visit, a person who provides information about the people and places of the local area.