The Scales of Pitiless Justice are a legendary set of scales possessed by the Dark Brotherhood. The scales have a powerful enchantment, although its effects vary.
Circa 2E 582, the Brotherhood seemingly used the scales to bless high ranking members. For those affected, bounties placed on their heads for murder and assault would fade far more rapidly.[1]
In 3E 433, the scales were possessed by Vicente Valtieri, a vampire member of the Brotherhood's Cheydinhal sanctuary. They were offered as a bonus reward for a contract within the Imperial Prison, in return for sparing the lives of any guards encountered. At the time, the scales were used to magically enhance the bearer's strength, intelligence and agility, but at the cost of their personality. It is unknown if the bonus was actually given.[2]