Answer:
Walk on the living, they donโt even mumble, Walk on the dead, they mutter and grumble. What are they?
Surname of the pilot of the Millennium Falcon.
I build up castles. I tear down mountains. I make some men blind. I help others to see.
I count time, but have no end. Tick tick, but I am not a clock. What am I?
Two bodies have I, though both joined in one. The more still I stand, the quicker I run.
I am your mother's brother's only brother in law. Who am I?