This game can end up being wildly fun.
The object of the game is to corrupt the previous wish and then you wish for something yourself.
Example: A: I wish I was the best piano player in the world!
B: Granted. Everyone else who plays the piano is dead except for you. I wish I will never go thirsty.
Since this is a literary forum, I'll add that it's very similar to the horror story Monkey's Paw by author W. W. Jacobs.
So here goes: I wish I will never go thirsty.