Answer:
When I come in from sea to shore twenty paces you'll see No less no more.
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?
To cross the water, I'm the way. For water I'm above, I touch it not and truth to say, I neither swim nor move. What am I?
A dragons tooth in a mortals hand I kill I maim I divide the land.
In buckles or lace, I help set the pace. The farther you go, the thinner I grow. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.