That is incorrect statement. Nomads are not dependent on Cardamine, it does not cause addiction for them and they use it for a different purpose altogether. To them it's sort of "adam" substance from Bioshock - a clay to alter genetical code, controlled modifications. As with humans (i.e. Outcasts and other addicted humans) it's the similar mechanism but resulting in different outcomes. Essentially it's a "modding" resource, bio-modding in this case.
