Increase your Dexterity score by 2 and your Intelligence by 1

You gain 120 ft. of Darkvision.

Your senses are sharper than usual, you gain proficiency in perception.

You know how to understand, speak and read Common and Elvish

While you are in daylight, you have disadvantage on perception rolls, that rely on sight.

You learn the dancing lights cantrip. You can cast faerie fire (when you reach lvl 3) and darkness (when you reach lvl 5) once per long rest using this feat, or you can use a suitable spell slot to cast them additional times.

At the end of your turn, if you are in darkness, and you didn't move or take any actions on your turn, you become incorporeal until you take an action or move. While incorporeal, you are invisible and you are resistant to all damage.