The Houses of Hive Primus send out teams of workers into the Ash Wastes to find potential areas to mine for valuable materials. Prospector teams consist of highly skilled engineers supported by servitors to do much of the physical labour. All teams leave the hive suitably armed so that they may defend themselves from the hostile inhabitants of the wastes. Each team will have access to a number of industrial vehicles, which they use to survey and take samples from areas surrounding the local spires. When a team finds an area that is worth mining first it is claimed in the name of their house. Then, House workers erect semi-permanent structures in that area and slaves are brought in to quickly recover the find before ash storms reclaim it. The more areas a House prospector team identifies, that recover profit-making materials for the House, the more expensive and effective equipment its house will invest in it.