1.A single leaf from a Mandrake plant is kept in the mouth for one month, from full moon to full moon. If at any point the leaf is swallowed or removed from the mouth, the process must be started again.
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2.The leaf is removed at full moon and placed in a crystal phial that receives the pure moon rays (if it is cloudy, again the process must be restarted), together with one of the wizard』s hairs, a silver teaspoonful of dew collected from a place untouched by sunlight and human feet for seven days, and the chrysalis of a death』s-head hawk moth.
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3.This mixture is placed in a quiet, dark place and must not be disturbed, touched by sunlight or even looked at until the next electrical storm. Meanwhile the following spell must be performed without fail every dawn and every dusk: the tip of the wand is placed over the heart and the incantation 「Amato Animo Animato Animagus」 is spoken. There will come a time when, when the wand touches the chest, a second heartbeat is sensed.
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4.As soon as lightning appears, the final stages are enacted. The crystal phial should now contain a blood red potion, which is drunk after performing the spell one last time. The witch or wizard experiences a 「fiery pain and an intense double heartbeat」, and has a vision of the animal they are to transform into.
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5.The first transformation is painful and frightening; it is important not to resist the change or panic, as the animal mind may take over. The Animagus can change back into their human form by visualising themselves in their minds. Learning to transform at will takes a lot of practice, but gets easier and faster with time.
