I never cease to be impressed by the buildings in Sharlayan, made of sturdy stone and vastly different from the architecture of the Pillars. Ere it was abandoned, the city-state was known for effective fortification techniques to protect their scholars against Horde attacks. Mayhap there is knowledge yet to be found within those walls to fortify our own bulwarks. Journey to the Dravanian hinterlands and bring back samples of Sharlayan flagstone so I may better learn what kind of materials were used.
Travel to the Dravanian hinterlands, equip a miner's primary tool, and commence mining.