Building Blocks: Monster Room

Monster Rooms started popping up in Minecraft in June 2010, extremely early in the game’s development. You’ve probably seen one – it’s a cube-shaped room, with cobblestone walls and mossy cobblestone on the floor. Inside, there’s a zombie, skeleton or spider spawner and usually a couple of chests holding tasty loot – saddles, ingots, horse armor, seeds, music discs, that sort of thing.