In NetHack, a wand of undead turning will, when zapped at an undead creature (zombie, mummy, skeleton, vampire, etc) to run away in terror. This is one of those items that you tend to stash in your bag of holding when you find it on level 5 of the Dungeons of Doom, and only remember you had after the vampire lord kills you on level 26.

Of course, the Dev Team couldn't resist the chance to exploit a (dubious) double-meaning. If this is wand is zapped at a corpse, it rises as an undead creature -- the corpse is turned undead. This is almost as bad as the infamous cursed potion of gain level.