A gold ring depicting a snake that could have been, but never was, a dragon.
Fallen foes are more likely to drop items.
Snakes are known as creatures of great avarice, devouring prey even larger than themselves by swallowing them whole. If one's shackles are cause for discontent, perhaps it is time for some good old fashioned greed.
Found in the Profaned Capital, on a corpse inside a locked cell along with Siegward. The only access is through an open window reached by jumping from the chapel's roof above the toxic swamp (Old Cell Key required).