Final answer:
The devil is traditionally depicted with a staff with a black serpent's head, symbolizing his evil nature and ties to deceit. Such symbolism was particularly relevant during the Salem Witch Trials, where the devil's influence was a core belief of the Puritans.
Step-by-step explanation:
The symbolic device that the devil is often depicted carrying is D. a staff with a black serpent's head carved onto the end of it. This device is symbolic of the devil's insidious and evil nature, echoing ancient symbolism where serpents represent deceit and danger. In the context of historical beliefs, especially during the time of the Salem Witch Trials, the devil was believed to be physically present and influential, thus attributing to him physical attributes and items such as this serpent staff. The Puritans, including figures like Cotton Mather, held strong beliefs in the devil and witchcraft, often citing the devil's influence as a cause for various societal issues.