1v1 Choice, Upgrade and Arena

8 players game mode.
Game start with choosing phase, all player are in circle, 4 players choose their opponent.
Once choosing phase is over, players are teleport into 4 different arena on the map Ilios Lighthouse.
Once the 4 fights are over, players can choose between 2 upgrades. There is 5 upgrades in total, 2 are randomly choose for player to choose one.
After upgrade phase is over, game return to his first state. Choosing phase.

There is 8 round in total.
Game mode can handle when players join or leave the game.
If player join, he choose a number of upgrade equivalent to the number of past round. He will join other players after fights ends once he have choose all his upgrade.