I’m reading a ninth century grimoire – the Picatrix. This is a difficult, obfuscated book, laden with traps for the unwary. For instance, there are healing potions that call for large amounts of bitter almond.
And then I found this wonderful confection.
For generating enmity and discord.
These confections are compounded for enmity and ill will. Take four ounces of the blood of a black dog, two ounces each of pig blood and brains, and one ounce of donkey brains. Mix all this together until well blended. When you give this medicine to someone in food or drink, he will hate you.