Lets say there was a massive arena for WoM, you could script a way for it to auto countdown and stuff, while that happens the players are restricted to an area and take damage if they leave it / just lose / solid wall.
Heres an example, two players stand buttons, and it then teleports them to the ring and they fight. There would also be a GUI to configure the match, 1v2, 2v2, no wepaons, armour, timed, first to a % of their health, ect.