Answer:
I am nothing really at all, Yet I am easily foundΝΎ Ignore me at your own peril, and you might end up crowned!
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
Vikings use this for warmth.
I'm light as a feather, yet the strongest man can't hold me for more than 5 minutes.
This item is used in most sports, has 4 holes, comes in a variety of colors, and there is a state that shares its name. What is it
Iβm grown from darkness but shine with a pale light. Very round I am and always a lady's delight.