Elemental Allergy: The hero suffers adverse effects if he is exposed to a specific one of the hundred-odd elements. This Allergy only occurs if the element is present in a pure state and in an accumulation of at least one ounce. If the element is combined in a molecular state or is in insufficient quantities, no Effect occurs. The element must be within 20 feet of the hero for it to have any Effect.
This allergy can be overcome by physically insulating the hero from the element or by increasing the distance between them.