Nadirite
From Age of Sigmar - Lexicanum
Nadirite is an alchemically treated metal that can be used to drain souls. It is needed to forge the weapons of Ossiarch Bonereapers. Imbued with Shyishan magic from Nagashizzar even a minor wound from a weapon built from Nadirite can cause a victim's soul to be painfully devoured by the necrotic energies of the Shyish Nadir.[1a][1b]
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