When you have time to gather materials and a safe place to brew you can create three doses of any poison you’ve used before. Alternately you can describe the effects of a poison you’d like to create. The GM will tell you that you can create it, but with one or more caveats:
- It will only work under specific circumstances.
- The best you can manage is a weaker version.
- It’ll take a while to take effect.
- It’ll have obvious side effects.