Ha! You're asking for it!
And that's just off the top of my head. You'd better change that to something like an Amulet of Contingent True Resurrection (ressurects the wearer into a new body upon death; wearer can choose whether or not to come back). Of course, that may be considered overpowered.
- Eternal suffering. The amulet gets stolen by a demon. You die and come back to life so that you may be horrifically tortured for the rest of eternity.
- Continuity problem. The clone isn't really you, so you still lose, even though somebody exactly like you is running around.
- Realistic cloning. A fetus that is genetically identical to you appears next to the amulet.