Wool of bat, and tongue of dog

The ghouls are getting restless in my neighborhood. Cobwebs abound, the dead arise slowly, pushing off their weighty tombstones. In the distance, I can hear a plaintive howl, the moon is full, sheathed behind the thick fog. Best not to wander late in the dark, my pretty.

I'm beginning preparations for my annual Halloween feast. Day by day, I go about gathering the ingredients . . .

In the caldron boil and bake;
Eye of newt, and toe of frog,
Wool of bat, and tongue of dog,
Adder’s fork, and blind-worm’s sting,
Lizard’s leg, and owlet’s wing,—
For a charm of powerful trouble,
Like a hell-broth boil and bubble.

{excerpted from Macbeth, William Shakespeare}