Sazed's metal sheets

Sazed's metal sheets first appear in The Hero of Ages as the repository of the Terris religion's knowledge, painstakingly transcribed onto metal to resist Ruin's alterations. Throughout the book, these sheets become the key to preserving the true history of the world and the prophecies of the Hero of Ages, serving as the final defense against Ruin's lies. Their existence allows Sazed to uncover the truth about the nature of the world and the role of the Hero, ultimately leading to his ascension as Harmony.