Difficult

What can you throw but not catch?

Halo of water, tongue of wood. Skin of stone, long I've stood. My fingers short reach to the sky. Inside my heart men live and die.

Who makes it, has no need of it. Who buys it, has no use for it. Who uses it can neither see nor feel it. What is it?

In the forest, this blends in just right, but every December it is covered with lights. What is it?

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