FURVERT!

animal_genitalia animal_penis anus backsack balls big_balls butt countershading dragon equid equine equine_genitalia equine_penis erection feral genitals hi_res horse male mammal mid_transformation mythological_creature mythological_scalie mythology penis potion presenting presenting_hindquarters quadruped scalie sepiruth solo species_transformation spinel_(sepiruth)tongue tongue_out transformation transformation_potion