Linchpin Spike

The Linchpin Spike emerges as a pivotal Hemalurgic artifact in Mistborn Era 1, designed by Ruin to serve as the ultimate key to its release from the Well of Ascension at the series' climax. Though absent from earlier books, it crystallizes in 'The Hero of Ages' as the final piece in Ruin's intricate plan, capable of stripping Preservation's power and enabling the world's destruction. Its role underscores the intricate interplay of Hemalurgy and divine imprisonment, marking a critical evolution in the Cosmere's magical and cosmic stakes.