The shop disappeared very weirdly. Anyway, that doesn't matter you, and you head to home. At least you'd rather stay in your home than this street to learn about this strange thing.
You arrive your apartment, and take out the amulet. It looks quite old and useless, but also antique and expensive. It seemed quite expensive to buy for at $10. You pick it up and look closely. There are 10 engraved animal patterns on it, and also little dial on it. The dial is pointing on the horse shape on the amulet. It seems that in can be not only spinned, but also... pressed?
As soon as you accidentally press it, you see your room start to shrink. Short brown hairs grow all over your body. Your hands and feet will deform and become hooves. Your bigger and heavier body makes your all clothe ripped and you stand with four legs. You look at yourself, and find that you've become a big brown horse.
"Neigh, Neighhhh?" You said, even though you tried to speak "What? How I became a horse?" You think the amulet can be the only reason. You lower your elongated neck and look at the amulet that has fallen to the floor. It is difficult to see clearly with the horse's eyes, but you look closely, you see that the shape the dial is pointing to is now a human shape.
Okay, than probably the amulet changes you into the animal which its dial is pointing on. So you can press it again to be human again.