How I Came Up With Feruchemy and Hemalurgy — A SanderFAQ

Brandon Sanderson
Brandon SandersonMay 7, 2026

Why It Matters

Understanding Sanderson’s creative origins shows how personal adversity and mentorship can forge iconic, ethically layered fantasy systems, offering valuable lessons for storytellers and industry innovators.

Key Takeaways

  • Insomnia in high school sparked idea of storing personal attributes
  • Feruchemy uses metal to bank abilities for future use
  • Pharaoh powers emphasize internal strength over external sources
  • Hemalurgy introduced moral complexity by stealing others' powers
  • Inspirations include David Farland’s Rune Lord and Sanderson’s unpublished drafts

Summary

In this SanderFAQ video, author Brandon Sanderson walks viewers through the genesis of two of Mistborn’s signature magic systems—feruchemy and hemalurgy. He recounts a personal insomnia episode from high school, wondering why he couldn’t "save" his sleep, which seeded the notion of banking one’s own attributes for later use. This concept evolved into feruchemy, where metal objects act as repositories for strength, speed, memories, and even sleep, contrasting with alomancy’s external power source. Sanderson explains that the Pharaoh abilities in the series were designed to feel "zen," drawing power from a character’s own future planning rather than a mystical external force. Hemalurgy, by contrast, emerged from his desire to explore a morally fraught system that steals abilities, a notion inspired by his late mentor David Farland’s Rune Lord series. The result is the iconic Inquisitor spikes that literally embed stolen powers. He illustrates these ideas with vivid anecdotes: the nurse’s office scene that sparked the sleep‑storage metaphor, the thematic decision to bind feruchemy to metal for narrative cohesion, and the deliberate moral tension hemalurgy adds to the story’s conflict. These personal and literary influences shaped the mechanics and thematic resonance of the Mistborn universe. The discussion underscores how an author’s lived experiences and mentorship can directly inform world‑building, producing magic systems that are both mechanically elegant and ethically complex. For creators and fans alike, Sanderson’s behind‑the‑scenes look offers a blueprint for turning personal challenges into compelling speculative concepts.

Original Description

In this week's SanderFAQ, Brandon elaborates on the history of both Feruchemy and Hemalurgy. From insomnia-riddled nights to energy vampires and railroad spikes, the origins are fascinating.
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