The corrosive effects of black magic

The corrosive effects of black magic are presented as a gradual human danger, distinct from the immediate physical action of a curse. In Lord Wigmere’s account, prolonged work around sinister artifacts can wear away a person’s good nature; the idea transforms the theft of the Heart of Egypt from a question of deliberate guilt into a more troubling possibility, that exposure itself may have altered the person involved. The Brotherhood of Chosen Keepers treats this danger as real enough to require continuing protection.

The Rule and Its Mechanism

Lord Wigmere struggles to explain the effect, describing how people who work around vile things may have those things’ influence wear off on them. He then makes the claim more specific: Egyptian funerary and black magic can eat away at a person’s good side until little of it remains. The image is one of gradual dissolution rather than a sudden curse taking hold. It suggests a vulnerability built up over time through proximity, not necessarily a conscious choice to use black magic or serve its purposes.

The rule is therefore different from the visible, abrupt effects of a cursed object. When Theodosia attempts to remove the curse from the Bastet statue, she makes a wax replica, prepares a potion with rue, draws protective wedjat eyes on her palms, and recites a spell while wiping the statue through a rag. The hieroglyphs rise from the statue, but, after a distraction, stream toward Isis instead of the wax figure. Isis becomes violently altered. This is an immediate transfer gone wrong, not the slow corruption Wigmere describes. The distinction matters: the book shows both magic that attacks through an observable curse and a more insidious danger that may change people through sustained exposure.

The Heart of Egypt and Henrietta Throckmorton

Wigmere connects the rule to the investigation of the Heart of Egypt’s disappearance. The Brotherhood believes the theft was an inside job and fears that Henrietta Throckmorton may have been involved. He immediately separates suspicion of her from a charge of deliberate betrayal: in his explanation, it is not her doing, but the possible effect of black magic to which she has been exposed over a large portion of her adult life.

His account locates that exposure in her work in the pyramids. Month after month, she spends long periods among artifacts in their pure, undisturbed state. Wigmere compares the cumulative effect to leaving a pudding out in the rain: the rain eventually dissolves it and leaves pits and fissures. The analogy makes his theory intelligible as attrition, while also making its implications difficult for Theodosia to accept. The danger would not need to announce itself as possession or a single dramatic attack; it could leave a person gradually diminished, with consequences that appear to implicate her actions.

The revelation also changes the emotional stakes of the inquiry. Theodosia reacts with alarm and refuses to accept the explanation, insisting that Wigmere may be wrong and that the Keepers themselves might have been corrupted by their work. Her challenge follows directly from the rule: if contact with black magic can erode a person’s goodness, then the investigators cannot claim automatic immunity simply because they investigate it. Wigmere and Stokes answer by pointing to the protections they use, not by denying the underlying risk.

Protection and Practical Limits

Stokes explains that the Keepers wear protection at all times, that it is ingrained into their skin, and that they take additional precautions several times a month. These measures make the danger part of the organization’s working conditions: exposure is not treated as harmless, and protection is maintained rather than assumed to be a one-time safeguard. The account does not specify the full procedure or demonstrate its exact effects, but it does establish that the Brotherhood has an ongoing system for guarding against corruption.

Other encounters with curses show why such practical defenses matter, while remaining distinct from the gradual effect Wigmere describes. When Danver’s blisters and boils spread up his arm after he touches a cursed object, Theodosia places an amulet around his upper arm without touching his skin. The curse surges against the amulet and retreats, but she warns that the barrier will not hold all day and asks for wax. The scene shows a defense that can impede an active curse without resolving it permanently. It complements, rather than explains away, the Brotherhood’s more sustained precautions against black magic’s corrosive influence.

Significance

The rule makes expertise morally precarious. The Keepers’ work requires them to approach the very artifacts whose influence may damage those who handle or study them; knowledge and service do not remove the risk. The possibility of corruption also complicates judgments about guilt: the Heart of Egypt may have been stolen by someone inside the museum, yet Wigmere’s theory leaves open whether the person responsible acted freely or had been changed by exposure. For Theodosia, this is not an abstract warning. It places her mother’s character, the Keepers’ credibility, and the safety of anyone who works with cursed artifacts under the same unsettling question of how much contact with black magic can take away.