Sympathy

Sympathy
You can use items of your foes to enhance your spells.

Benefit: When casting a spell that targets a single creature and grants a saving throw, the DC to resist is increased by +2 if you possess an effigy – an item of physical, emotional, or spiritual significance to your target. If you possess a body part of the target, the DC is increased by +5.

If part of a ritual, possessing an effigy will give the caster a +4 bonus to the caster level check. A body part will give a +10 bonus. If you use this ability, the target is always considered unwilling, so it must attempt a save to resist, even if the spell is normally harmless.

Any effect on the target will affect the effigy or body part. For many spells, this will do nothing; evocations will often destroy the focus.