Answer:
I am an insect half of my name is another insect. I am similar to the name of a famous band.
If you have me you want to share me. If you share me you don't have me. What am I?
I am the beginning of the end and the end of time and space. I am essential to creation and I surround every place.
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
What gets sharper the more you use it?
Give it food and it will live, give it water and it will die.