Whats round, but not always around. Its light sometimes is dark sometimes. Everyone wants to walk all over me. But only a lucky few have. What am I?

In deep azure robes, a cold monarch waits, With winds that whip and stormy fates, A trident's realm, in solar dance it spins, Guardian of seas where mystery begins.

I reflect the world while holding only air. I travel briefly before dying with a touch.

i have four legs and two eyes and i go in the fields a lot

Hard skin and soft red flesh, I bleed with every bite and slice. Eyeless but full of eyes, spit me out when you find me.