Answer:
The sharp slim blade, that cuts the wind.
I can travel from there to here by disappearing, and here to there by reappearing.
Iron roof, glass walls, burns and burns and never falls.
What has one eye but cannot see?
There are millions of me. I am very small but when moving fast I am deadly.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?