This is an arena I made for my RP village in Gazamo Land. I spent roughly 8 hours on it.

It has fully functional gates that are operated by the King. The rooms the combatants entered are one-way only. Once a combatant has entered a room, they may not leave until the King has raised the gates for the battle to commence.

There are 3 levels (excluding the royal room) to the arena.
Level 1 - Romulus
Level 2 - Pompilius
Level 3 - Hostilius

I named the levels of the arena after the first three kings of the Roman Empire.

Also, the two combatant colors are red and blue, a tribute to Rooster Teeth :D