Safety feature

Jon thought for a minute about what he could do with Sa'Raia, and decided he needed to make sure these powers would stay his. He asked, "You can only grant MY wishes, correct?" Sa'Raia nodded and replied, "Unless you wish otherwise, master." John asked another question, "But, someone could use the rock to take you away from me?"
She nodded again. Jon spoke up, "Genie, I wish that the rock would disappear to a place where no-one can get to it, but that it will come to me if I want it to." Sa'raia nodded and the rock disappeared. For now, Jon thought he was protected. But what would he do now?