The arena is a flat platform, cleaned and polished for the matches. The octagonal arena is fenced off, making it so none may leave or enter until a match has concluded. There are earth disk slots and water vents evenly spaced out underground for use.
With these rooms, dice rolls can be performed by participants. Be warned that these rooms contain logs, cheat and I will know. Simply put #d5 and you'll perform a roll. Links can be found in the comments section.