Answer:
Scythe of darkness, Shadow’s light. Guiding eye of thirteenth sight.
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
What is never used unless it's in a tight place?
What gets wet while drying?
What binds two people yet touches only one?
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!