Answer:
I have a strong affection for belly buttons.
Flat as a leaf round as a ring. I have two eyes but can't see a thing.
I am a sharp looking horse with a flaxen tail. The longer I run the shorter my tail becomes.
I am a word. I become longer when the third letter is removed.
A dragons tooth in a mortals hand I kill I maim I divide the land.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.