Go to the west side of Bravil then go diagonly down to the bottom corner of the map. There should be a church, go in the undercroft then go to the bottem. U should find a big crystal, near it is a rock that looks like a tree trunck. Click x on that the u get purge salts. Then go back to the crystal, Click x and u r cured. Plus u can do it over and over again.