In the southernmost reaches of the southernmost lands, among sun-baked golden hills and rocky ruins, the cities of Gor Kull offer travelers and citizens a plethora of sinful concoctions, powders, and draughts, born of a wicked desire to addle the mind and befuddle the eye. Yet, should ye wish to arm oneself with knowledge against such evil brews, I present such guide.
There is an important pair of fraternal twins. Possibly minor dieties, sorcerers, or maybe just an important pair of nobles. One is evil and one is good. The thing is, the one who looks evil at first glance is the good one, and vice versa.