Prerequisite: race that has dark-vision; and origin of character requires majority of their upbringing/life in the underdark or similar (no or dim light)
You are used to the dark. you gain the following benefits;
you have advantage on perception and investigation checks in dim or no light
you do not suffer disadvantage in magical darkness
You also gain a higher sensitivity to light, if you enter are in no light for more than 3 days you are uncomfortable and suffer disadvantage of all checks for 1 hour, if you are in dark conditions for longer than one week you are under disadvantage for 1d4 hours
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