Answer:
What kind of dog keeps the best time?
I'm a ruler with 12 agents. Half of them work in the darkness. Who am I?
Sometimes I fly as fast as the speed of light. Sometime I crawl as slow as a snail. Unknown until I am measured but you will certainly miss me when Iām gone.
It's been around for millions of years but is never more than a month old. What is it?
I destroy your home from the inside out.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.