Answer:
Jeremy realizes that Nethergrave is not just a computer game near the end of the story when NetherMagus tells Jeremy that he is already there.
Step-by-step explanation:
“Nethergrave” is a science fiction short story by Gloria Skurzynski. Jeremy is the main character of the story who is a computer games addict. He once comes upon a strange computer game with advanced Artificial Intelligence features. After he starts playing the game he find the game so interesting that he is completely lost in it virtually and really.
The dialogue between NetherMagus and Jeremy near the end of the story where Jeremy realizes that Nethergrave is not just a game is;
“Stay with us, Jeremy. Live forever in Nethergrave. Here no one will ever abandon you, I promise.”
“How do I get to Nethergrave?”
“You’re already there!”