Hogwarts Student Severus Snape helps Ravenclaw student with her animagus transformation Part 2/3. To brew the Animagus potion, you must first keep a single mandrake leaf in your mouth for an entire month. To this phial, you must add one of your own hairs, a silver teaspoon of dew collected from a place that neither sunlight nor human feet have touched for seven days, and the chrysalis of a Death's-head Hawk-moth (here shown in the video). This mixture must then be hidden in a quiet spot and left