The wager is guild vs guild winner takes all in a 3 vs 3 guild leaders choose who they challenge. So the game is set both guilds are simply honor bound by the agreement.
However here is the question.
If one of the guild substitutes a challenged player with someone who is ranked as higher in skill, and plays disguised, is that in YOUR opinion cheating?
Oh and one more food for thought, the guild that lost their players seemed to know one another play styles, meaning they suspect there was something suspicious.
So as a Follow up, what would you do if you were in either or guild?