Answer:
My full powers come when my makers are dead. I await a heavy hat to put on my head. What am I?
You throw me out when you use me and take me in when you are done.
What has 3 feet but no toes?
I work when I play and play when I work. What am I?
I need to be taken before you can have 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.