S4·E11 The Blue Feather

Lisa's convinced that Hungarian gypsies have placed a curse on her when she receives a dreaded blue feather in the mail. To "de-hexify" her, Haney sells Lisa a ridiculous recipe that she mixes up, places in a green purse, and hangs outside the front door. Eb gets a look at it and panics because the "green purse hex" will bring a drought. He counteracts it with his own concoction in a yellow purse. Oliver takes action to put a stop to all this foolishness.