An arrow of direction typically appears to be a normal (or possibly magic) arrow. 

Its magical properties make it function much as a locate object spell, however, empowering the arrow to show the direction of the desired way. Once per day the device can be tossed into the air; it will fall and point towards the desired way, and this process can be repeated 7 times during the next 7 turns. 

Note: the arrow will point only towards requested way/location. The request can be only for one of the following: stairway (up or down), sloping passage (up or down), dungeon exit or entrance, cave, cavern.

Requests must be phrased by distance (nearest, farthest, highest, lowest) or by direction (north, south, east, west, etc.).