Answer:
Round as an apple, deep as a cup, and all the kings' horses can't fill it up. What is it?
My first is a creature whose breeding is unclear. My second, a price you must pay. My whole can be found in the river of Time and refers to events of today.
You must keep this thing. Its loss will affect your brothers. For once yours is lost, it will soon be lost by others.
It is more feared than fear itself, And no one can escape it. It takes no sides and does not judge, it does not know to hold a grudge. It is the most clearest result, Of how life beats you by default.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.
What is yours but only used by others?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?