If set to true, the first spawn will be the global spawn (e.g from /wizards setLocation <arena> RED_SPAWN) and the respawns are going to be the team's spawn location list (from /wizards addSpawn <arena> <team>).
Added a optional setting for arena.yml: Map.Min-Y-Blacklist
Blocks in this list will ignore the Min-Y setting and explode anyway. This has to be added manually to the arena.yml, example: