Answer:
Lighter than feather and softer than silk, yet the strongest man in the world cannot hold me for more than a few minutes. What am I?
I have a foot but no leg. What am I?
In my life I must bare my bloodline I must share.
I am the building with the most number of stories. What am I?
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
When is it bad luck to see a black cat?