The old man had a mysterious smirk as he flicked the door with his finger. At once, the object vanished and a pitch-black passage was unveiled in front of them.
Adam was instantly threatened by this sight.
Because... not even his Vision Adaptation skill can probe into that darkness!
For him, it was a truly frightening sight.
"There is nothing to be horrified about. Somethings are invisible in life unless you experience them."
Saying this, Sage walked into the darkness and disappeared without a trace. Adam didn't ponder on the philosophy of his words and followed suit.
There was a brief period of complete blindness as he walked ahead but it soon faded away to disclose an entirely advanced setup.