Minecraft wiki entry for Blaze_farming, associated text: This design is different from previous designs. There is no redstone for this design, making it a lot simpler to build. Also, unlike the first 2 designs, the player must move around to kill the blazes, as well as completely kill the blazes, rather than just hit them once. Basically, this design allows the blazes to fall into rows, where the player can safely attack their feet, without taking any damage from the blazes.