Unseen.

Tolkien, Smaug Flies Round the Mountain, 1937

I come from under the hill, and under the hills and over the hills my paths led. And through the air. I am he that walks unseen.

I am the clue-finder, the web-cutter, the stinging fly. I was chosen for the lucky number.

I am he that buries his friends alive and drowns them and draws them alive again from the water. I came from the end of a bag, but no bag went over me.

I am the friend of bears and the guest of eagles. I am Ring-winner and Luck-wearer; and I am Barrel-rider.

Bilbo Baggins