animal_genitalia animal_penis anthro balls big_balls big_breasts big_penis breasts curvaceous curvy_figure equine_genitalia equine_penis ftm_transformation fur gender_transformation genitals grey_body grey_fur grey_hair gynomorph hair huge_balls huge_penis intersex magic magic_user mid_transformation nipples penis solo solo_focus species_transformation thick_thighs transformation voluptuous white_body wide_hips blubtf canid canine canis mammal wolf
First Rule of Wizarding: never cast a spell in which you don't know the effects.
Second Rule of Wizarding: Keep your spell book organized and spells and give them proper headers...

Ash found out quick why you don't cast magic for horse fertility in place of a self pleasuring spell!