Answer:
What is neither inside the house nor outside the house but a necessity for any home?
Be sure to shout for its answers are weak, but there is no language it cannot speak.
Scythe of darkness, Shadow’s light. Guiding eye of thirteenth sight.
The older they are the less wrinkles they have.
Lighter than what I am made of, More of me is hidden Than is seen.
Special abilities and brightly colored underwear are all you need to be one of these.