This thing devours all things. All man, all beasts, all flowers and trees. Even the fiery sun, and the shadowy moon, will one day be devoured by this thing. Stone it grinds, metal it bites. And it shall make wood rot. Is it powerful? Well it is rather not, but it kills powerful things a lot. Its immortal yet it is not some type of god. What is it?
Around the world, a wingless thing flies, and on the way it whistles and cries. Sometimes it helps destroy towns and trees, but sometimes it relaxes humans and beasts. It can fly through holes so tiny, so small. It can fly through plains that are big and wide. From the north, to the south, it is feared when it comes. But also enjoyed by the people around. What is the thing?
Used to threaten, used to defeat. Sometimes it grows, sometimes it shrinks. Used to conquer, used to protect. It marks your downfall, it marks your success. The true god of war, the creator of mess. What is it?
For some in the world, it is as precious as gold. Yet, this thing, is never sold. It is kept, but never used. It's a weakness that cannot be removed. A weapon that can be used against god. If they have it, you know it, then they have lost. What is it?
In the dark, deep at night, you come to visit me sometimes. You'll adventure in my world, for quite some time. And once you leave, you might return with fright. Otherwise, you will return with pure delight. What am I?