A volcanic, tectonically unstable death world, Haddrack is also a forge of the Divine Light of Sollex, a militant sect of the Adeptus Mechanicus that venerates destruction as divine function. The planet’s surface is torn by magma flows and rift lightning storms, forcing most operations into orbit, where Sollex sancta perfect las-weapons, photonic blades, and noospheric war systems.
On the ground, four noble houses rule fortified hive-domes and deploy colossal land engines to exploit shifting ore veins. Beyond their reach, scavenger prospectors risk rift lightning and seismic collapse in servitor-drawn sledges, hunting rare crystals and mineral ingots.
Ignis Aeternus WH 40K campaign notes 