We got tired of having small cobblestone farms and having farms that duplicate TNT. So we took on a journey to build a ghast fireball powered cobblestone farm, which produces us over 340k cobblestone per hour!

The decoration is a giant cobblestone block, but the inside is full of redstone.... and ghasts!



Download the Ghast Powered Cobblestone farm and try it out yourself: WORLD DOWNLOAD



To start the farm, hop into the middle minecart and you should appear above the hopper. Now, go to game "Settings" -> "Controls" and enable sneak HOLD. You want to always be sneaking on top of this hopper. Then remove the block in that hopper and the farm should start. To stop the farm, drop an item below you into the hopper.