“It has been said,” the old crone coughed, “that as you hold a rabbit by the foot and lower it into acid, its luck will flee into the arrested foot and provide fortune to the bearer. But then again, how much luck could that rabbit have had to begin with?”
A rabbit’s luck need not be a foot, though this is a common form. The more sadistic may trap the luck in an ear, and, though awkward to produce, tails are also sometimes used.
The rabbit’s luck, when clutched tightly, provides a +1 bonus on all rolls made by the user that can reasonably benefit from a stroke of luck. The luck is exhausted after 7 rolls which succeed only because of the bonus.