A Hypno Gun

John made a wish.

Suddenly Harley was standing next to Wonder Woman. The two women were naked and doing sexy poses as water fountains. Water streamed out of their mouths.

This is awesome! He can finally be free of her!

Hell, he can have whatever he wants now!

He made another wish, and suddenly everything was back to normal. Wonder Woman forgot about what happened, and Harley lost her memory of the stone and forgot that she ever had him as a minion.

John needed more time to think, and he wanted to lay low, so he went to Jump City.

He always had a crush on the Teen Titans female members, and if he's going to test out this rock, he might as well use them.

John made another wish.

A small ray gun appeared in his hands. Towards the bottom of the gun was a grip and trigger, and on the bottom of the grip was a dial with the letters B, T, and R written on them for "Blank", "Trigger", and "Reprogram".

It was a hypno-ray, and the buttons each had their own functions. Blank will empty the target's mind and make them completely and unwittingly obedient. The trigger function will keep them blank for ten seconds. During this period, John must supply a trigger and corresponding action. If he fails to do so, the target will wake, thinking nothing is amiss. The reprogram trigger will make the target blank as well. However, during this blankness, John can change anything about this person's personality. From large to small things. Saying the word "revert" will remove these changes. The word "wake" will bring targets out of their trance. Targets will have no memory of being shot by the hypno gun, nor will they remember John even having it.

John smiled.

Time to test this out.