TNT based mob farm

A TNT based general mob farm by Jamenial, updating Fallen_Breath's Ultimate Mob Farm design which only worked up to 1.13. Mobs spawn across a perimeter and are killed by duplicated TNT the instant they appear, with an average lifespan under one game tick, so the mob cap clears continuously and spawning never pauses. Around 244,000 spawns an hour. It needs a full perimeter and large scale bedrock removal, and it lives or dies with TNT duplication.

• Meddysbox says the small version is bottlenecked by its collection rather than its spawning. Only 16 hopper lines, which caps it near 144,000 an hour when the spawn rate should support 200,000 to 215,000.
• Build it at the bottom of the world. Jamenial says general mob farms run faster the lower they sit and this one especially.
• The lecterns are there to stop slimes spawning on top of the modules and taking up the mob cap.
• Tinted glass can be swapped for anything that blocks light without conducting redstone. Jamenial names redstone blocks and observers, and says keep the height map flat and avoid solid blocks at foot height.
• The target block only exists from 1.16. On anything earlier, use a redstone block or a detector rail instead.
• Open the sample worlds in 1.17 rather than 1.18 or later. They are built at y=0 and the world bottom moved to y=-64 afterwards.