Minecraft wiki entry for Zombified_piglin_farming, associated text: Instead of letting the zombified piglins fall to their death, we can also use a fall breaker to make sure they get damaged, but don't die. This allows us to use a looting sword to get XP, gold nuggets, gold ingots, golden swords and rotten flesh. Depending on the height of the drop, you can make sure that you could kill the zombified piglins with only one blow. Making it easy to kill and less hard on your sword in terms of durability.