[@Orion] Well, if you want to be an Alchemist, I could give you some sort of ability that would allow you to create your potions with your own body. I mean, you devour several ingredients, your insides facilitates their reaction with one another, then you excrete the new substance through your mouth, pores or in any other manner you'd prefer? With that, you'd probably have some sort of increased tolerance when it comes to toxins and foreign substances in general.

[@Lucidnonsense] I get the idea that you want, but I'm not really getting a concise them from it. Its a bit vague since I can't really determine the scope of the abilities you're looking for.