I've been the neighborhood witch in Shadow Glenn since 1892 - and I'll tell ya, there are two things you should never do when casting spells. Never forget to wear your reading glasses - - and never, ever rush a spell. You think to yourself, "it's no big deal, right, you've been doing this for centuries," so you over confidently cast the spell you've used a thousand times.
There is a e-n-o-r-m-o-u-s difference between EYE of Newt and THIGH of Newt. One is for beauty - the other is for cross species transformation. One can help clear up acne or say, help a struggling student see new insights, and the other may have turned the McNeil boys into miniature bovines.
Miniature bovines which are now shitting in my kitchen.