Answer:
I am always hungry, I must always be fed. The finger I lick will soon turn red.
He's small but he can climb a tower.
I am not alive, though I never die, to no one I've ever told a lie, today I can be god's warrior, and serve him with no horror, but tomorrow I might be devil's knight, for I am what ends the light.
What cannot talk but will always reply when spoken to?
What is not a ball but yet a sphere, and holds all lands and people year after year?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?