Thieves, Hideouts and poisons.

So, I'm not really sure if this has been suggested yet or not, but it would be kind of cool if thieves and maybe shadows could use a mortar and pedestal or brewing kit to make poisons and drugs. Maybe even a throwable flask or something like that. It would also require a hideout/lair similar to the necromancer's gravebrewing. Since thieves can envenom their weapons, drug other and poison food/drink, it makes sense. There's tons of herbs, mushrooms and stuff laying around that could be used in the process.