Answer:
I make you weak at the worst of all times. I keep you safe I keep you fine. I make your hands sweat and your heart grow cold. I visit the weak but seldom the bold.
What has 4 fingers and a thumb but isn't alive?
What is made of wood, but can't be sawed?
I stink in living but when dead smells good.
I am a type of animal that hang out in the mist
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.