Answer:
What liquid can contain the soul?
Sharp and long, flag of the world. What is it?
What goes through a door but never goes in. And never comes out?
I'm white, I'm round, but not always around. Sometimes you see me, sometimes you don't.
The more of it there is, the less you see.
If you can spot one of these eastern warriors, it means they're not doing their job right.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?