A dubious NetHack scroll
that does what it says it does (which is not very useful, in my opinion). It will tame every monster
within one square of you, i.e. they become your pets
Apparently, a scroll of taming will also calm down an angry shopkeeper, provided he's right next to you. In just the right circumstances (such as when an angry shopkeeper is beating you to death), I suppose this could prove useful.
Guess what the cursed version does...