Final answer:
The text does not mention Nic doing anything to make a bulla's magic go away. Instead, it describes a separate event where a Cappadocian from the household confronts an alleged witch, resulting in his own bodily harm, madness, and death.
Step-by-step explanation:
The text provided is from Petronius' Satyricon, specifically from the part where characters are sharing ghost stories and supernatural events. The question pertains to a character named Nic, but based on the text provided, Nic doesn't do anything to make a 'bulla's magic' go away because the text doesn't mention a 'bulla' or any actions of Nic affecting a 'bulla'.
Instead, the text describes an incident involving witches and a supernatural encounter where a Cappadocian, who was part of the household, attempted to confront what was believed to be witches. The Cappadocian, described as strong enough to 'lift a mad bull off its feet', bravely engages with the perceived threat, resulting in body bruises and eventual madness and death.
Therefore, Nic's actions concerning the 'bulla's magic' are not referenced in the supplied passage. The focus is instead on the tale of witches and the aftermath of the Cappadocian's encounter with them.