Answer:
You use it between your head and your toes, the more it works the thinner it grows.
Twigs and spheres and poles and plates. Join and bind to reason make.
A certain wizard resided in a city made from this gemstone.
A morbidlyยญ-named body of water
What comes once in a minute, twice in a moment, but never in a thousand years?
I have two bodies joined together as one. When standing still I run and run.