Note: This was a dream of mine. I have this warning here because some visitors have thought my life had just gone to pot, when really they were only reading one of my crazy dreams. :)
I was sent off to learn from this witch. The witch was pretty with long, black hair. She and I were out in the woods near my house, and we had with us her huge black and green-furred pony (regular hair: black, mane and tail: green). You could ask him to change colour or shape at will, and the witch could shape/color-change too. I wanted him to be blue, and to be a large dog, so he changed. I rode him up the road to my house. I kept almost slipping off, since I was riding without a saddle. I found a friend of mine’s parents trading their pet rabbit and other things to my mother for one of her cactus. It was nighttime.