I like the ideas here, I am confused about what it means for something to to have a 1D6 chance. Did you mean 1 in 6? Is that rolled on the same die for aid and steal chance? Maybe its, roll a 1D6, on 1 they aid you, on a 6 they steal your treasure and feast on your tender bits?
Anyway, love the idea, very evocative. Cheers.