Introduction: A Lore Supplement for Deep Mettle.The man. The mystery. The machines.Osh Esidh, First Illuminator to the Satrap, delves into the story of Gaspar Meck - Antissa's former Chief Engineer -  his contact with the legendary Mathematician Azal, and how he came to touch the secrets of the city's ancient Builders.----- CONTAINS PIVOTAL SPOILERS FOR DEEP METTLE -----...