Admiral I've just looked back through the last thread and I see no reference to a "dampening field" or it being "shut off."
About the swords: I've posted out these ultra sharp, light and indestructable swords before. However, with the re-emergance of magic they take on other properties. When faced with a "magical" enemy they glow blue, lose weight and cause burns when they touch flesh. The burn is proportional to the wound. So a cut will blister, a severed limb will probably burn a bit more of the limb off and a death blow will cause the body to explode in spectacular fashion.