This tutorial shows you how to build the easiest creeper/gunpowder farm in Minecraft 1.21+. No cats needed — this design works in Java and Bedrock Edition, survival-friendly and efficient for rockets ...

This build creates a zombie farm that efficiently generates drops and experience for survival mode. It is reliable, compact, ...

To make a mob farm in Minecraft that automatically spawns and kills enemies, you'll need stone, trapdoors, chests, hoppers, ...

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 ...