Dragon Scale Mail is made of the scales of one kind of dragon. Sometimes dragons collect their cast-off scales and gift them. Other times, hunters carefully preserve the hide of a dead dragon. In either case, Dragon Scale Mail is highly valued.
While wearing this armor, you gain a +1 bonus to Armor Class, you have Advantage on saving throws against the breath weapons of Dragons, and you have Resistance to Acid damage.
Additionally, you can focus your senses as a Magic action to discern the distance and direction to the closest black dragon within 30 miles of yourself. This action can't be used again until the next dawn.