Answer:
What measures out time until in time all is smashed to it?
Power enough to smash ships and crush roofs. Yet it still must fear the sun.
People are hired to get rid of me. I'm often hiding under your bed. In time I'll always return you see. Bite me and you're surely dead.
What goes up but never comes down?
When I'm born I fly. When I'm alive I lay. When I'm dead I run.
It rows quickly with four oars but never comes out from under his own roof. What is it?