Removed features/Space Arena

The Space Arena is a structure that spawns in Lunalus.

Generation
Space Arenas have a 1 in 905 chance to generate in Lunalus. They will usually generate around y = 15, never higher.

If a Space Arena generates on top of another structure, the Space Arena will always override the other structure's blocks with its own, with no known exceptions.

Structure
Space Arenas are box-shaped structures. They are composed mainly out of Lunar Bricks and Whitewash Bricks. On top of the structure, there are spawners that spawn Baumba and inside the arena are spawners that spawn Reflucts. This structure is a great find, as a respectable set of armor can be farmed here, along with other things.