A potion to cheat death... almost.
Argaiv Silaic, a wise, excentrical explorer and physician, once discovered the blue mushroom's secret, and had a chance to note what he found out.
In some regions, various occupations might be exclusively staffed by members of a particular race or ethnic group. As examples, a city's butchers might tradtionally have orcish blood, or all the dwarves in an area could be expected to join the miners' guild (even if they personally have nothing to do with mining). Those who violate these stereotypes may find themselves in conflict with local customs or idiosyncratic laws.