Answer:
I dance on one feet and knows only one shape. Someone with same name as me is very good with directions
Although glory but not at my best. Power will fall to me when the man who made me dies.
I am a king who's good at measuring stuff. What am I?
What can be cracked before it's used?
Everyone has me and no one can lose me. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.