Answer:
I can be simple or I can be complex. I can be found in this riddle or in everyday life. I can be shapes or even colors.
What goes into the water black and comes out red?
I am born in fear raised in truth and I come to my own in deed. When comes a time that I'm called forth I come to serve the cause of need.
The time between daylight and darkness when blood drinkers like to come out
I am a king who’s good at measuring stuff. What am I?
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.