9x6 flushing mob farm (creeper farm)

This is a classic flushing mob farm with the original design I think from Ilmango. Optimised for 0 spider jank and being as ugly as possible (cobblestone or nothing). Place water buckets in the dispensers and diamond swords in the deployers. I recommend mending and looting III (and sweeping edge and sharpness if you dug out a perimeter for this you psychopath). Place water around the edges of the mob funnel, but be careful not to waterlog the whole thing. Rates are wildly different depending on where and how you build, but a quick test revealed that it is at least a couple dozen creepers per minute. AFK spot is up top. Lever turns on/off the farm.