Answer:
What is it that has four legs, one head, and a foot?
Surname of the pilot of the Millennium Falcon.
I am the third from a sparkle bright, I thrive throughout the day and night. Deep in the path of a cows white drink. I've had thousands of millions of years to think. But one of my creatures is killing me. And so the question I ask to thee, is
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?