Answer:
It holds no blessings in disguise. Its rhymes are aimed at your demise, it's cast only to ruin, Whatever you are doin'.
Inside a great blue castle lives a shy young maid. She blushes in the morning and comes not out at night.
I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty.
It regulates our daily movements, but it feels no interest in our lives. It directs us when to come and go, but does not care if we pay attention. What is it?
A tiny bead, like fragile glass, strung along a cord of grass.
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?