Answer:
Glittering points that downward thrust. Sparkling spears that never rust.
I have four legs but no tail. Usually I am heard only at night.
What's as small as a mouse but guards a house like a lion?
The man who made it didn't need it. The man who bought it didn't use it. The man who used it didn't want it.
I have legs but never walk, I may have flowers but no soil, I hold food but never eat.
You use it between your head and your toes, the more it works the thinner it grows.