What Am I Riddles

Question: I rule the ends of the universe. I control its laws. I reign the galaxy. The start of space is the start of me. The end of the universe is the end of me. The name of my slaves bring mighty terror to you. The universe wouldn't work if it wasn't for me. What am I?

Question: The more you cut into me the bigger I grow, what am I?

Question: When I am released to the wind,
you look away and you pretend,
but away your friends I will send.

What am I?

Question: Had by few but treasured by all,
I'm on the inside and outside and I make men fall.

What am I?

Question: Under pressure is the only way I work,
and by myself is the only way I'm hurt.

What am I?