metalmind

In the Mistborn series, metalminds are introduced in the Final Empire era as specialized metal artifacts that Feruchemists use to store physical and mental attributes for later tapping, revolutionizing personal power storage through metals like tinminds for senses and steelminds for speed. Though first prominently featured in The Hero of Ages amid the escalating cataclysm, their foundational role traces back to earlier books where characters like Sazed employ them strategically in battles and survival. Across the series, metalminds evolve from personal tools to pivotal elements in the Cosmere's magic system, enabling hybrid Feruchemy-Allomancy like Compounding that proves crucial to overthrowing the Lord Ruler's regime and averting apocalyptic doom.