Dark Sun 2011
Fighting arena, huge multiple stages, large architecture.
In order to enter The Arena, in lue of a entry toll, all travelers are required to pull from a basket of broken pottery. 1 in every 500 pieces in the basket is marked, so the unlucky few who pull must make a performance in the arena main stage. Most of these fights are against slaves or weaken captured beasts, and are usually casualty free. Operators of the basket are notoriously corrupt, and are generally willing to take a bribe or look the other way for important merchants.