The subject develops an internal spherical sac that contains fluid or semi-solid necrotic flesh. The internal cyst is noticeable as a slight bulge on the subject’s arm, abdomen, or face (wherever you chose to touch the target), or it is buried deeply enough in the flesh of your target that it is not immediately obvious - the subject may not realize what was implanted within her.

From now on, undead foes and necromantic magic are particularly debilitating to the subject, the cyst enables a sympathetic response between free-roaming external undead and itself. Whenever the victim is subject to a spell or effect from the school of necromancy, the victim makes saving throws to resist at a - 2 penalty. Whenever the subject is dealt damage by the natural weapon of an undead (claw, bite, or other attack form), the subject of the spell takes an additional 1d6 points of damage.

Protection from Evil and Good prevents the necrotic cyst from forming. Once a necrotic cyst is implanted, spells that manipulate the cyst and its bearer are no longer thwarted by protection from evil.

Victims who possess necrotic cysts may elect to have non-magical surgery to remove them. The procedure is a bloody, painful process that incapacitates the subject for 1 hour on a successful DC 20 medicine check, and kills the subject with an unsuccessful medicine check.  Cursing and undeserving victim is an evil act!