"Okay, calm down." So, that shop and this amulet is real magic. And... I'm a horse now! In an apartment! I should thun back!"
Pressing the dial pointing on a horse made you a horse. So, you sure that it'll make you a human again now. You dicide to press it once again.
You put your hand...front hoof on it, and press it. But without any consideration of your huge and heavy body, you pressed it too strongly. You hear the ominous sound of something breaking, and you removed your hoof immediately, but there were only broken pieces of the amulet. Anyway, it starts to change you.
As it broke, its magical energy flew out. That power of change hit you. There are a cheetah, an eagle, a dragon, a tiger, a wolf, an ant, a bear, a skunk, an owl, and a human, which was a horse, on the amulet. It's broken magic changes you into all of them at once, into the fusion of them.
Your head remains at horse's head, but your ears change to wolf's ears, mouth to eagle's beak. Also ant's feelers and dragon's horns come out on your head. Your arms are covered by feathers and turns to owl's wings. These wings end with five human fingers. Your legs grows bear's hair, and look exactly like thems. Hips are completely skunk's one, and cheetah's tail grows on it. Lastly, there are tiger's hair on your other parts.
"Oh my, What did I do?" you said in despair." You can speak now. Probably you have human vocal cords or something now. Anyway, you became a terrible fusion creature, and the only thing that can change you has broken. Maybe you'll be like this forever.