My PC's might be mounting a rescue mission against an outpost of the Unseelie Court. The court is composed primarily of evil Eladrin with the Shadow Creature template, as well as fey with the same template.
Most of the Eladrin are statted up with Holy weapons. The easy way to do it would be to just give all the evil Eladrin Unholy weapons. But this then poses a problem for Good PC's (and the weapons that Eladrin pack around with are REALLY nice for their CR).
So, if a Good PC ends up with an Evil Ghaele's +4 Unholy Greatsword, is there anything that can be done to remove the Unholy property from it?
Due to other factors, I might just change the Holy/Unholy to another +2 worth of enhancements, but have not decided yet. Regardless, the question stands.