Mail daemon

The mail daemon, &, is ostensibly a monster in NetHack, but has extremely peculiar properties and appears rarely. Its primary function, as its name suggests, is to deliver mail to the player.

When an item of mail needs to be delivered the daemon is placed on a square just out of sight of the player, rushes over to the location of the player (pushing anything in its path temporarily out of its way, exclaiming "Gangway!", "Pardon me!", "Excuse me!", etc.), hands the scroll to the player ("<Hello>, <player>! I have some mail for you." - it will "throw" the scroll to the player with an exclamation of "Catch!" if it can't maneuver next to the player for some reason), rush back to its starting square, and disappear. This all takes place within the space of one turn.

It is possible to summon the Mail Daemon by means of wishing for a statue of it which would then be re-animated by casting stone to flesh. This is largely useless, as the resulting mail daemon will disappear in one turn ("I'm late!") unless you attack it, in which case it will disappear if you step away from it. Killing the Mail Daemon will automatically (and silently) genocide Mail Daemons, preventing future mail delivery.