Answer:
I am a shiny metal sheet that covers BBQ food.
In your fire you hear me scream creaking and whining yet I am dead before you lay me in your hearth.
What has a head and a tail but no body?
I'm a ruler with 12 agents. Half of them work in the darkness. Who am I?
I am a kind of coat that can only be put on when wet. 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.