We know that Wind and Truth took place after Mistborn era 1, as it is referenced by Hoid when discussing Shards. We also know that Wind and Truth happens almost directly before Shadows of Self. Mistborn Era 1 has been mentioned to be hundreds of years before era 2, so based on that knowledge, how was Demoux able to be in Wind and Truth? My personal theory is Hemalurgy, but I would like some clearer answers.