Iron's poisonous nature is not quick-acting; for example, iron weapons do not cause sidhe additional damage. But long-term contact with the metal will slowly and permanently drain a sidhe's vitality (hit points and ability scores); ingested iron will do the same, but some damage can be reversed if the substance can be removed from the sidhe's system. In any case, sidhe will never have weapons, armor, tools, or anything else fashioned of this metal; they use instead various stones (flint, obsidian, etc.), and nonferrous metals and alloys (bronze, silver, gold, mithril, etc.). Note that most powerfully enchanted weapons (+3 or more) are made of alloys containing little or no iron, and may thus be used by sidhe.