“So… back in Zilvaren? It was never the iron, or the copper, or the gold that reacted to me? It was…” Kingfisher nodded. “It’s always been quicksilver. It was bound to many different alloys and metals before, back when there were plenty of Alchemists and the pathways were still open between our worlds. It made weapons more powerful. Turned them into conduits that could channel vast quantities of magic.”