The game is this:
1. The person before you will have posted a wish
2. You grant that wish but corrupt it and make it an unwanted reality
3. In the same post, you request a wish to be corrupted

Example:

Timmy: I wish for a puppy!

Jonny: Wish Granted! POOF! But you find that the puppy is missing all of its legs and tries to bite you when you come close.

I wish for a magic stereo!
_________________________ Lets Begin_______________________________________

I wish for the ability of flight

http://www.minecraftforum.net/topic/26803-softwarepluginbukkit-runecraft-261-15-02/

So this is the link to a mod that I feel is pretty good, but with others pluggins I don't know if it would work or not.