There is no keywords as you must enter here through the sign with a virus core with you.
This place is a hallway that is very short. As you go there you will see that you can't turn around as there is a wall. Then you would see an open space where the sky would be green. At the end is a destroyed arch that blocks your way. The sky would be green which is quite strange in this game but like most lost grounds it is out of the games boundary.
