Poison

There’s a snake in Brazil who’s venom’s the most deadly poison the world’s ever known. Unprotected contact with this snake ensures death within minutes.

But in a village near their habitat, the natives have an immunity to this poison. It’s they who harvest this venom, and sell it to those who know how to find them.

Winning their trust isn’t easy, and the venom’s expensive, but it’s more than worth it to see the look on your face as you finish your wine.

And watch you gasp for air.

But I don’t see why an anecdote would help with that…