Answer:
you can throw me away but I will always be coming back
I am the ultimate killing machine used not once but TWICE I can be made by humans.
I stink in living but when dead smells good.
I am the noise Santa's reindeers make
Drop me and the world will shatter. You can always find me where you empty your bladder. What am I?
I spend most of my day eating white. When I am quick enough I get rewarded with fruit and something blue. In a dark room with blue walls I run from the ghosts that roam the halls