Answer:
What lies in a tunnel of darkness. That can only attack when pulled back?
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?
Covered in stone and sun. It's home to many but also none. What is it?
I have a face, yet no senses. But I don't really care, because time is of the essence.
Different lights do make me strange, thus into different sizes I will change.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?