A neo-classical painting, showing a thrall revolutionary soldier with spoils.
During the Great Thrall Revolt of 592 AX, many aristocrats were killed or forced to flee their homes. Their possessions were seized by thrall freedom fighters, who took reparations for their years of servitude however they saw fit. The food and booze eventually ran out, but for a period of some weeks thralls ate better than humans anywhere in the Empire, and lived in luxury.
Some of the raided land was later ceded back to the Savic Empire during the peace accord, but thralls helped themselves to anything they liked on the way out. When the mages returned to their homes they found them stripped of valuables, and the buildings themselves burned or defaced with the sign of the coiled snake.
Thrall artisans later reworked the metal of looted silverware. For a while it was fashionable for thrall soldiers to wear trophy necklaces, strung with sigil jewelry from as many different mage clans as possible. Some included teeth and bones from the mages themselves.
You can see more about the world of The Loyal Ones here: http://thralls.weebly.com/