The witches brew crock also has two small holes in the top and 1 on the side maybe for something that creates smoke, lights or bubbles. Crock comes off of the stand. Crock has a large hole in the bottom with a removable cover. Could very well be one of a kind.
Do not know what this piece is made of. Possibly made from paper mache. I can tell you this is a very interesting piece of art. Stands 16 tall (top - bottom). I recommend taking a good look at all item details before purchasing.