Tiny Mining

Lupus metallorum = The grey wolf or stibnite, used to purify gold, as the sulphur in the antimony sulphide bonds to the metals alloyed with the gold, and these form a slag which can be removed. The gold remains dissolved in the metallic antimony which can be boiled off to leave the purified gold.

Also a death metal band, for those on bandcamp: https://goodtodierecords.bandcamp.com/album/lupus-metallorum