The Genie Stone

The stone he put in its place looked exactly like Jon's stone, except that it had a number 3 carved into it. It was the Genie Stone. Just like the mythical genie in the lamp, this stone only grants three wishes and no more to whoever possesses the stone. Wishes can be reversed and there is no range limitation. The only limit is the number of wishes that can be made: three. Once the first wish is made, the number 3 carved into the stone changes to a 2. Once it changes to the number 0, the one who possesses it cannot make anymore wishes with it, ever. But once the stone is given to someone else, the number changes back to 3 and starts over again, for that person.