I can’t stop thinking about Like a Ghost. It seems like it would solve the Thief’s problem of a lack of good “stealth” moves. It might even be able to obviate Backstab, if you add another option to it. How can we play with this move?
When you roll for another move that you want to perform in a clandestine manner, you may choose options equal to your DEX or less (but not fewer than none), and then tell the other players:
…how you draw attention elsewhere instead of to you.
…how you stay out of sight.
…that you remain silent.
…why you leave no trace behind.
On a 10+, all that you say is true. On a 7-9, the GM chooses one of your statements to be false, the others are true. On a miss, no guarantees.