Answer:
I can travel from there to here by disappearing, and here to there by reappearing.
It holds no blessings in disguise. Its rhymes are aimed at your demise, it's cast only to ruin, Whatever you are doin'.
My head bobs lazily in the sun. You think I'm cute. For my face is yellow my hair is white and my body is green.
The moon is my father. The sea is my mother. I have a million brothers. I die when I reach land
I have split the one into five. I am the circle that few will spy. I am the path that breaks and gives. I am the bow no man may bend.
You use it between your head and your toes, the more it works the thinner it grows.