This is what the Fanon letter would look like, exampled.
________________________________________________________________________ Dear <insert name here>,
You have been invited to compete in the world wide famous tournament, King of Fanon, this will conclude the prize as to being rich, and the title of King of Fanon, this tournament will include eight rounds of fighting against other teams within the same strength level, you will be asked to compete with teams of FOUR, meaning you will have to invite 3 other teamates to compete with you, those of you who do not have teamates will either be asked to leave or forced to fight other teams on your own.
This tournament in professional, those of you without profession, please do not turn up. We hope you enjoy the tournament, Good luck!
The KoF team