Does anyone know, how to make the sabotaged histachi brew?
I have tried it too many times already, I have swapped the mandrake roots and talked to the guy at the library and I have waited and waited, but haven't got the Brew. Please help me.

Replace mandrake root with modified mandrake root. Make sure modified mandrake is the only thing in the proper container. Wait for guy to show up. Sleep maybe a few times. Intimidate guy into helping you. Take sabotaged histachii brew. Serve cold with lemons.