"Present the key or perish."
A voice resounded in Sato's head as he stared at the eye that was looking his way.
Under the influence of the gaze, Sato froze on the spot and couldn't take a step further although he could freely move his hands and head. However, that wasn't the worst part.
As he stood on the spot, Sato felt that the ambience of the area within the barrier was changing. A death aura pervaded the area and was steadily increasing. From his experience as well as his intuition, Sato easily figured out that once the aura peaked, he would be dead.