Duralumin

Introduced in *The Well of Ascension* as a secretive ninth Allomantic metal—an ultra-lightweight aluminum-copper alloy—Duralumin manifests no standalone effect but dramatically amplifies the power of other metals burned simultaneously, enabling godlike bursts of Allomantic might. By *The Hero of Ages*, its composition expands to include manganese and magnesium, fueling explosive burns that obliterate all nearby metal reserves in a single, cataclysmic surge. This evolution underscores Duralumin's pivotal role in escalating Mistborn combat dynamics and thwarting Preservation's manipulations amid Ruin's apocalypse.