In this brief time, I will tell you how to make common mob farm. this post especially was created to help the players who just now joined GC Mob farm 1 : works good for zombies and skeletons (version 1) The image 7, and 9 show you how to build the redstone system and the blocks while the image 4 shows you how the piston will push the mobs outside the mob farm. image 8 stands as where the mobs which have been pushed by the piston will stand. here you can slay them with your sword. *just in case, put also slabs on it so that the zombie baby won't be able to get outside the mob farm system to attack you. image 10 will show you where to put the spawners (note : the bedrocks are supposed to be spawners, I could not execute any command to get any spawners for this tutorial) finally, image 11 will show you how's the condition inside the mob farm ! version 2 much like how we build version 1 of zombies and skeletons farm. this version is smaller than with 1 - wide block as the where mobs stand Image 14 and 13 will show you the structure mob farm 2 : Image 16 and 17 simply, use the water to lead the mobs. ya, they will stuck on the slab, but when you stand near the them, they will walk toward you then fall. Note : this building is really common. you can modify this farm in order to make other hostile mobs farm (like enderman). and the size and appearance of the mob farm also depends on how creative you are that's all. hope this will help you guys