Bloodhound

As a bonus action, you may mark one creature within 10 feet of you.  Until the end of your next long rest, your proficiency bonus is doubled for any ability check made to find the creature and you always know where it is if it's within 60 feet of you.  You also recognize that creature at the creature you marked no matter it's appearance.  This ability does not work if your sense of smell is obstructed or the creatures scent is obscured.  You can't use this trait again until finishing a short or long rest.