Weekend Event Trifecta
It's black & white, it's magic, it has an address AND it has a wacky illustration with floating hands. :D
See that address today.
I found so much interesting info, like this USDA judgment against them for "misbranding" (the "magic" part, despite containing only some caffeine and acetanilide) and causing illness (due to acetanilide, a toxin/carcinogen). As Wikipedia notes: "Acetanilide is no longer used as a drug in its own right, although the success of its metabolite - paracetamol (acetaminophen) - is well known."
Even more interesting are these two trade cards, which seem purposefully designed to induce headaches:
