Answer:
I build up castles. I tear down mountains. I make some men blind. I help others to see.
Thousands lay up gold within this house. But no man made it. Spears past counting guard this house, but no man wards it.
As destructive as life, As healing as death; An institutioner of strife, Just as prone to bless. It is all that is good, Yet with an evil trend; As it was the beginning of things, It can also be the end.
You throw away the outside, eat the inside, then throw away the inside. What is it?
What has a spot and is very bright, is sometimes, red, white, blue, yellow or green and is often blinding.
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?