Curse

Curse is a mastery level 4 maho spell which requires a component of the target, such as a lock of hair or an ounce of blood. It must be something that contains a part of the target's spiritual energy, and if the curse is successful the target finds odd things being done by or to them. The caster must keep the component used to create the curse on them at all times, because if it is lost the curse is broken. That is the only way the curse can be broken. (3E p. 271)