How does Jane Yolen use imagery in Dragon's Blood: The Pit Dragon Chronicles, Volume One?

Example of Imagery:

"The men marched into the leaves and stabbed the squirming little horrors with their knives, severing the heads from the bodies. The drakklings died quickly, leaving the dreadful stench behind. Their thick, dark blood coated the knives and had to be washed off immediately in the sand. Even then, the blood left pits and ruts in the shine."