Boat looting gold farm

A boat looting gold farm on the nether roof, and the fastest design that needs no perimeter and no bedrock breaking. Zombified piglins spawn on the platforms, cross an overworld bridge and end up in boats in the killing chamber, where you kill them with a looting sword. The point of the whole thing is clearing the mob cap fast enough that new piglins keep spawning, and it kills 54,000 of them an hour. That is about 1650 gold blocks and a great deal of XP. Java 1.18 and up, and 10,064 magma blocks.

The creator's pinned corrections. It works in 1.18 and up, not 1.16 as the video says. And do not use bamboo rafts for the boat looting, mobs sit higher in a raft than in a boat and it will not work.
Since 1.21.2 the farm needs two changes or it does not run at all. The creator made a fix video for those, and a second one for a death that can happen during long sessions. Both are linked from the pinned comment.
Since 1.20.2 attack reach changed. Stand against the sand block behind you rather than against the trapdoor or the piglins can reach you.
Since 1.21.5 the portal hitboxes changed and the boats no longer slide through when you light the portal. Push them in with a piston. On 1.21.10 build the dispenser station in the middle of the portal instead of at the side, otherwise the boats clip into blocks on the way through.
The armor stand breaks when your attack rate is not steady, which server lag causes. An 11 tick attack interval fixes it, and keep fire aspect off your sword.
On a server the farm stops while somebody is standing in the overworld. Watch the 3:15 mark before building it in multiplayer.