Minecraft wiki entry for Soul_soil_farming, associated text: First of all, you will need an unlimited supply of soul sand, which can be obtained via piglin bartering, and wood (which can be obtained from tree farms). Use the soul sand and wood to craft soul campfires, and break those campfires without Silk Touch to get soul soil. Then you can repeat the process with more soul sand and wood. While sounding fairly simple for manual farming, it is considerably hard to automate because of crafting it, placing it and breaking it. Crafting it and placing it already relies on player interaction, and in Bedrock Edition they are not stackable, so that makes it more annoying to automate. Breaking it will rely on TNT duplication or a wither chamber if you play on Java Edition, and on Bedrock you will need to break it yourself.