Answer:
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
In a tunnel of darkness lies a beast or iron. It can only attack when pulled back. What is it?
I'm not a bird, but I can fly through the sky. I'm not a river, but I'm full of water. What am I?
Glittering points that downward thrust. Sparkling spears that never rust. What am I?
What has legs but doesn't walk?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?