If (knock on wood) an underworld general becomes grandmaster, I would say the way to go would be to give him/her a free pass into the UW tourney and a frst round bye. Its a bit weird then though because the whole idea of UW becomes distorted when a player who would be chosen for war by an element ends up back on a team of players who are supposedly "not good enough". I think it could work, the myth would just have to change a bit.
I like this concept a lot but I would change one thing.
Instead of UW Grandmaster getting a first round bye, he or she should get a
free pass to the final battle. UW tournament would happen as usual, but instead of the winner getting crowned the General, he or she would have to fight
one last time, against the current UW champ. Sucks for that tournament winner but that's
.
Whatever happened in the final battle, the winner of the tournament would of course get the "King of Underworld" icon as a reward, and would get a spot in the UW team as a Lieutenant.