"Wait, no! You cant be serious!" you shout at the warlock as hair all over your body starts thickening. You gasp as a long donkey tail erupts from your ass. You charge at the bearded man hoping it's not too late to stop his spell, but he raises his hand and shoots a confusion spell directly at your head. "Donkeys aren't supposed to attack their masters".
When his spell hits you immediately temporarily forget what you were doing. You're oblivious to the large donkey ears sprouting from your head or the gray fur covering nearly your entire body. Not sure what else to do you approach the handsome bearded man saying "I think I might be lost.. can you help me?". The warlock grins at you and heartily says "Hah! You're not lost, you're my new pack mule!". The warlock reaches out a scratches behind your furry ears. You lean into his scratching graciously and absent mindedly say "I am? huh... I didn't know pack animals could talk". The wizard barks with laughter and summons a bridle from thin air and says "Good point. Here, this will help". He slips the bridle into your mouth and around your head accelerating the transformation. With the bridle on, your head quickly transforms into that of a feral donkey. You try to thank him but when you open your mouth a loud "HeeHAW!!" escapes.
You stare dumbfounded at the wizard as the transformation continues its course. Your toes clench up and harden into hooves and your ass nearly doubles in size as you start to wobble. The warlock slaps you on the back and you fall forward catching your fall with your hands. Your fingers merge together into hooves and your arms straighten out. The warlock summons a saddle as your fur covered belly nearly quadruples in size. Your rock hard dick sticks to your belly as a sheath envelops your cock. "HEEhaw!!"
The wizard smiles and places the saddle on your back and ties his large pack to your rump. "It's about time I found someone to carry all these damn supplies for me". He hoists himself into the saddle and grab the reins attached to your bridle.