The mask takes its shape quickly around the main facial features of its owner. If it is put on another person, someone who isn’t looking too closely will be unable to tell people from each other.
It’s lucky that the gnomes struggle to tell a human from a Kretch, so it should work for them.
All that is needed now is to find some sufficiently unscrupulous person ready to impersonate someone else.
Make contact with Gloum the Swindler or Chigrik the Thief so that the mask can be used.
The mask will allow additional reputation to be gained, depending on the daily tasks completed at the Celestial Fair, but only up to 9 of them.
Unfortunately, the mask is extremely fragile and may crumble to nothing on the unscrupulous face of a swindler.