Custom Blood Magic: Ritual

Ritual of the Tell Tale Heart (Intermediate Ritual)

The dangers of the more subtle of Kindred powers are arguably more than the Speed of the Toreador, Strength of the Brujah, Claws of the Gangrel or Physical Resistance of the Ventrue. The creator, being more into the subtle than the direct, wishes to create a substance that will detect the use of Kindred powers when used on a creature. His theory is that by embuing an object with vitae that has an affinity toward a certain discipline, any use of that power directed at it (meaning the person carrying the object) will cause it to react. This reaction could be caused to become apparent to the victim.

This ritual requires the heart of a mammal (of any size), the vitae of a Kindred who has at least a basic understanding of the discipline to be targeted and a specially created vial to contain the above two.
When completed, the heart will have magically soaked up all of the blood and appear to be in perfect condition. It is placed in the vial to complete the ritual. The vial need be carried on one's person to provide a connection to the vial and heart. The first time the bearer is targeted with the discipline that the heart is keyed to, it turns black and begins to decay at about a rate of an hour to completely turn to ash. Multiple vials will all react at the same time so carrying more than 1 per power will be fairly useless.
While this may not actually protect the bearer in anyway, it may allow future investigations some measure of insight on certain situations. The ritual when it is active is not keyed to any particular person, just a certain power. Thus it could be given to a ghoul or loyal retainer for checking after they have gone to have a meeting with one's rival and so forth. It is found that a lead shielding of at least 1/4 inch thick will prevent these from activating, so a small lead-lined box would allow for multiple vials to be carried, just not active. Once the heart has "told" it of course needs to be discarded while the vial itself is reusable.

When created, a heart is soaked in a blood point from a kindred who has at least one level of the chosen discipline that the creator wished to be warned against. The heart is placed in a specially created vial which may be reused after the heart has been used up. The first time that the chosen discipline is used on the bearer of the heart/vial, the heart will turn from normal looking to black and it will start to decay at a fairly rapid rate. At the end of about an hour it will have dissolved completely. This allows the bearer to know somewhat how long ago they were affected. The discipline in question must be one that is directly targeting the bearer and require a contested challenge. Example: Aura Perception would not set it off, but telepathy would. Entrancement would but Magisty would not since it is a defensive power. Thaumatergy paths would need to be "keyed" individually. As stated in the previous section, all of the vials that are keyed to a certain discipline will all activate if multiple are carried.