In Alloy of Law, evidence is uncovered that the bad guys are attempting to breed a Mistborn. The time span of the gap between this and the original Mistborn trilogy, perhaps with the interval I vaguely remember being stated for between Alloy and the next main trilogy added, is suspiciously close to 300 years. Does the organization Wax’s father is part of know the location of the Pits of Hathsin, or otherwise have access to Atium, either now (as of Alloy) or in the time period of the planned second trilogy?
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