[@JaceBeleren] Like some sort of bad trip? For example, could give you power as to cast fireballs, but as soon as it fades it leaves a gap in your mind of somthing that you never had really, you just tapped into it for a little time. I like the idea, but I think it sould be even more than just illegal, it should be something terribly specific, right? Like you need either specific elements which are hard to get or laughably huge amounts of materials and/or time to prepare it.