Answer:
I am what brings things together. Without me everything you see would be a total mass or debris everywhere. What am I?
I get paid to shoot people then blow them up.
A dragons tooth in a mortals hand I kill I maim I divide the land.
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
I am a precious stone as clear as diamond. Seek me out while the sun's near the horizon. Though you can walk on water with my power try to keep me and I'll vanish in an hour.
Give it food and it will live, give it water and it will die.