The Schadenhold was a fortress carved out of rock on the world of Lesser Damantyne. It was located in a giant underground cavern and was designed and built shortly before the Horus Heresy by the loyalist Iron Warriors Warsmith Barabas Dantioch. It was eventually besieged by the forces loyal to Horus.
The Schadenhold itself was a giant rock spire that projected from the ceiling of the cavern. Upon the edge of defeat, Warsmith Dantioch detonated explosives and killed thousands of traitorous Army soldiers and Iron Warriors as well as destroying a traitorous Emperor Titan. It held out for 366 days against the 14th Grand Company and the ground forces of the 51st Expedition Fleet with only a few Iron warriors and Sons of Dantioch holding it.