Kobold

Darkvision. You can see in dim light within 60 feet as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.   Nimbleness. Smaller than most on your adventures, you can move through the space of any creature that is a size larger than yours.   Underestimated. Creatures larger than you tend to dismiss you out of hand. Your first attack in combat has advantage if the target is at least one size larger than you.