Worked into the grip of this weapon is an iron cross set in the center of two concentric circles.

Any attack with an illusion bane weapon ignores any miss chance created by an illusion effect (including effects that mimic illusions, such as a displacer beast’s displacement effect). However, you must still target the correct square when making an attack against a for that has total concealment. This is a continuous effect and requires no activation.
In addition, once per day you can activate an illusion bane weapon to destroy illusion effects. This ability can take one of two forms:
After hitting a creature, you can activate the weapon in the same round to make a dispel check (1d20+10) against each illusion spell currently affecting the target.
This effect essentially acts as a targeted dispel magic spell, but it functions only against magic of the illusion school. You must make a separate check for each illusion spell affecting the target.
Alternatively, you can attempt to dispel a single illusion by touching it with the illusion bane weapon and speaking the appropriate command word. For example, touching a silent image spell (or an image generated by the mirror image spell) with the weapon subjects it to the dispel check immediately. A successful check against any part of the illusion dispels the whole effect, so dispelling one mirror image ends the spell entirely for the target creature.

Prerequisites: Craft Magic Arms and Armor, true seeing, dispel magic.
Cost to Create: 1,000 gp (plus 300 gp for base item), 80 XP, 2 days.