Forgive me if this is out of place, but from what I understand there is no such thing as an addictive narcotic on carrion fields. I had this idea that a druid who was trying to be a good little druid and do everything with nature found this mushroom with special powers, (don't know enough about the flora of carrion fields to give specifics) anyway it does something like + int, or +str. This shouldn't be anything new.

However this druid learnt to refine it using some special technique (haven't thought how that works yet) and makes it more potent, HOWEVER it is addictive. This would mean that you get more of a plus the more you use it, but if you use it a lot then you become addicted. If you are addicted then your movement points are pathetic when not using the drug as well as occasional health problems (such as if you were starving). Another possible consequence could be randomly using some of your powers without the player desiring it.

This would open up huge possibilities for orderly evil charachters to create a drug syndicate. Out of the immortals I would bet that Tanadin's charachter might kind of sponser these drug lords.

Well there it is, if there is something like that already I apologize.