Thrice The Brinded Cat
Dwarven master stonemason and architect working for Surabar Spellmason
Discovered the old dormant caldera 700 years ago that is now Cauldron, and suggested to Surabar that it could be a more defensible position than the more open Redgorge, with its wooden palisade walls.
Surabar agreed and tasked Dromlin and his army of dwarven and gnomish architects and stonemasons to raise walls surrounding the rim of the caldera. Once there, the dwarves began excavating massive blocks of malachite for the walls. At some point, the dwarves dug deep enough that they filled in the resulting cavity at the edge of Bluecrater lake with a fortress of their own, which they named the Malachite Hold.