Translations:Gamerules/16/en
From DragonMineZ Wiki
While allowBuildingInArenaStructures is false, players in Survival or Adventure mode can't place or break blocks inside the structures of the tag dragonminez:build_protected (Fortuneteller Baba's Palace and the Cell Games Arena) or inside the Otherworld tournament grounds. They get the message "This place is protected. You can't build here.". Explosions don't destroy blocks there either, and mobs can't grief them. Creative and Spectator players are not affected.