Answer:
I am a ship that can be made to ride the greatest waves. I am not built by objects but built by minds.
I am the kind of fish that chases a mouse.
What is black when it's clean and white when it's dirty?
What loses its head in the morning but gets it back at night?
I'm a ruler with 12 agents. Half of them work in the darkness. Who am I?
When is it bad luck to see a black cat?