The Anvil of Apotheosis is the sacred forge-rite by which Sigmar transforms worthy mortal souls into the immortal warriors of the stormcast-eternals. Upon this celestial anvil, hidden within the vaults of Azyr, the God-King reshapes the essence of fallen heroes, tempering their spirits in lightning and binding them into bodies of sigmarite and glory.
The process is one of divine artifice and terrible cost. Souls plucked from death across the realms are hammered into new forms, purged of frailty and reforged as living weapons of the storm. Yet each passage through the Anvil strips something away, and those reforged many times over grow distant from the mortals they once were.
More than a mere ritual, the Anvil of Apotheosis represents Sigmar's greatest gamble and his greatest triumph, for it is the wellspring from which his eternal hosts are drawn. Without it, there would be no Stormhosts to hurl against the Dark Gods, and no hope for the reclamation of the realms.