## Undo Resistance *You learn to use cold iron weapons to unravel your opponent's magical defenses with a well-placed sneak attack.* **Prerequisite:** Sneak attack, sudden strike, or skirmish ability **Benefit:** If you successfully deal sneak attack damage with a cold iron weapon, you reduce the target's spell resistance by 1 point per die of sneak attack damage. Multiple uses of this feat stack. Undo Resistance can reduce a target's spell resistance to 0, but not below 0. Spell resistance reduced in this manner returns to normal 1 hour after the last sneak attack.