d30 feature is part of the ever-updated-and-slowly-but-surely-going d30 Sandbox Companion. It's also an updated/expanded version of the d30 Cult Generator originally posted back in March of this year.
I realized the "Mantra" portion of the original table was a little goofy, and a bit of a waste in the context of the d30 Sandbox Companion. Instead, I thought a name generator for the cult/secret society (like the d30 Tavern Name Generator) would be a bit more useful. Additionally, I've added a component to the generator that handles the immediate goals of the cult. To me, this expanded chart works much more like an adventure seed generator (give the cult a name, a leader and a goal... and you've got a nuisance that any local leader would hire adventurers to get rid of.)
To download a free PDF of this updated/expanded
d30 Cult Generator from MediaFire, click here.