Sky-iron was a type of metal that Armoured Bears or Panserbjørne such as Iorek Byrnison use to create their armour. It is difficult to cut or break, with the exception of the Subtle Knife, which is stated to cut through Sky-iron 'Like butter'.
Behind the scenes
- Although sky-iron is fictional, native peoples of the Arctic value meteorites, particularly the Cape York meteorite.
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