XYZZY

The quintessential magic word, originally from the "ADVENT" text-adventure game. The word XYZZY would teleport the player when spoken in the right location.
> (From ADVENTURE)
> >You are in a room filled with debris washed in from the surface. A low wide passage with cobbles becomes plugged with mud and debris here, but an awkward canyon leads upward and west. A note on the wall says "MAGIC WORD XYZZY".