Arena fix

[HoneyBadger]

What if one Nation had the ability to "host" the Arena, with say a gold bonus, but would in return have to put a prize in, themselves? That way, there'd be prize variation, and the host would have motivation to put in a good prize, because the more people who participated, the bigger their gold bonus would be. If gold weren't a good enough motivation, gems could be substituted later on in the game.