spare haven
Having a game option for hosts to cast a deep fog over the arena, visibility becoming a challenge to overcome while you find one another within the mist. It could open up a few strategies to take the reigns, such as area-denial, quick in-and-out strikes, etc.
It could make for some terrifying situations (4 people rolling up to the exact same spot without realizing until it's too late, or two people unknowingly getting into crossing paths while running around the arena)
rotund plume