Answer:
I shoot but never kills
I can be long or short. I can be grown or bought. I can be painted or left bare. My tip can be round or square. (one word)
lighter than feather and softer than silk yet the strongest man in the world cannot hold me for more than a few minutes.
I'm blue at day and black at night. I do contain some creatures born and died. What am I?
I go up and down at the same time. Up towards to sky and down towards the ground
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.