I prefer to write my own material, but every once in a while, only the Bard will do:
"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 howlet's wing,--
For a charm of powerful trouble,
Like a hell-broth boil and bubble."
Macbeth (IV, i, 14-15)