One of my favorite easter eggs in Nethack was the way a Mailer Daemon would arrive in-game and deliver a scroll when you received an email on the host Unix syst

One of my favorite easter eggs in Nethack was the way a Mailer Daemon would arrive in-game and deliver a scroll when you received an email on the host Unix system. Which then became a game exploit because there were some obscure in-game uses for the scroll items.