Answer:
What measures out time. Until in time all is smashed to it?
A time when they're green. A time when they're brown. But both of these times, cause me to frown. But just in between, for a very short while. They're perfect and yellow. And cause me to smile.
Halo of water, tongue of wood. Skin of stone, long I've stood. My fingers short reach to the sky. Inside my heart men live and die.
Long and slinky like a trout, never sings till it's guts come out.
I have a title and many pages I am a genteel of genteel descent I am a killer veteran of war I am a slave to my lord Pledged to his service.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?