Answer:
What is weightless but it needs two person to hold it?
A tiny bead, like fragile glass, strung along a cord of grass.
It is the great nemesis of the lactose intolerant.
I fly through the air on small feathered wings, seeking out life and destroying all things.
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?