Eleventh Metal

The Eleventh Metal, a mysterious allomantic alloy unknown to the Final Empire's Keepers, emerges as a pivotal force in the Mistborn saga. Initially discovered by Kelsier during his imprisonment in the Pits of Hathsin, this metal becomes the key to unraveling the Lord Ruler's immortality. Across the series, it evolves from a hidden weapon of rebellion into a symbol of lost knowledge and the cyclical nature of power in the cosmere.