Answer:
If you spot one of these eastern warriors, they're not doing their job right.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.
I'm full of holes, yet I'm full of water.
Lighter than what I am made of, More of me is hidden Than is seen.
I cost no money to use, or conscious effort to take part of. And as far as you can see, there is nothing to me. But without me, you are dead.
What do angels sing in the shower?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?