This was fun and I just had to share...
Spoiler:
So my PCs are pretty good at identifying creatures, and figured out what will stop a revnant. They ended up using the scarf (the one that killed Iesha, since it didn't have time to reset after downing the party oracle) tied to a pole as an on/off switch to follow her around the house. At the time, they still thought Aldern was in sandpoint and figured if she left the front door they could stop her. Once she led them to the basement and below they simply pulled a red light/green light to have her lead them straight to the skinsaw man battle. She finally made her save in the caverns and they had an undead ally for the entire battle. My dice seemed hot for everything but her save. All told, it was a lot of fun.
*sits back and then slowly applauds*
I can't let me group read of this. They'll try it themselves. ^^;;