You are going to need a lot of blocks for this build so you should better get to farming. As for the blocks themselves, you can pretty much use anything. Cobblestone and Wood are the most common ...
Farms are an essential part of Minecraft, especially in Survival and Hardcore mode. They can be a constant source of food and resources. Expand the definition a bit and we can also include experience.
To make a mob farm in Minecraft, you'll need stone, trapdoors, chests, hoppers, slabs, and water. Your mob farm will automatically spawn enemies and collect them into ...