Answer:
Only two backbones and thousands of ribs.
Known to accessorize with feathers, trumpets, and harps.
What is that over the head and under the hat?
You use it between your head and your toes, the more it works the thinner it grows.
What word has kst in the middle, in the beginning, and at the end?
Do what he says and you'll be fine, don't and you lose the game.