Gladiator Arena

From Straticswiki

Each City in the world has a Gladiator Arena. The gladiator arenas are used for PVPing, as when your hirelings blackout, they don't lose experience. Certain arenas such as Trauma Gladiator Arena have challenges which summon monsters in the arena, and there is a reward for defeating all of them. These types of challenges can be fought with up to two people at a time, but those who enter the arena thereafter may watch.