QUOTE (Yerameyahu @ Sep 28 2012, 10:03 AM)

Nah, StealthSigma, the point is for the drug to hurt you, not sobriety.

But Stahl, screw mages!
Drugs hurt you because of the effects caused when sober, not while on the drug. Really, the big problem is that I only provide the addiction chassis but not any withdrawal penalties penalties.
So the chassis (penalty) essentially tells you what your essence is considered for everything but death or permanent burnout. So you get an increased penalty each time you use the drug and the penalty comes once you've gone without using the drug for a certain period of time.
As far as it being a big mage nerf, yeah. It is. It means the mage has to constantly be on the drug. to keep their essence up high enough to not overly burden their magic score. It means that the mage is addicted and dependent on the drug, which is one of the common aspects of drug addiction. That means that yes, there could be mages that are completely incapable of casting a spell if they're sober if they've used drugs long enough.
Like I said, it's still a chassis. It only really has effects on things that are reliant on essence. However, since it is a numeric chassis to represent addiction you can easily say "When your total addiction essence penalty reaches 0.5 the characters starts taking a <penalty> when sober."