Sanderson says that he's been working on this project for several years at this point, but it isn't based on any of his properties.
Elden Ring publisher wants to collab with Mistborn author
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Brandon Sanderson's Stormlight Archive novels will get an official tabletop RPG in 2024
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Acclaimed Fantasy Author, Brandon Sanderson Is Working On A Deck Building Game That Will Be Released In 2024 — CultureSlate