Tutorials/End of light mob farms

The end of light mob farm involves 2 key components - update suppressors and light suppressors using an update suppressor to prevent the portals from updating when the side obsidian blocks are removed. This creates a sliced portal in which mobs can spawn where the light level is 0. The light suppressors allow the light levels of the portal blocks to be 0, meaning that mobs can spawn directly into the portals and get transported into a drop chute.

Update suppression
Update suppression is a glitch that allows the player to update certain blocks without causing updates to another. The main use is to make sliced portals which is a key component of the farm. It is used to place blocks at impossible block states usually done by stack overflow. If the update is cause directly by a player, it will not crash the game. But if it is done by natural means, it will crash the game. Before 1.19, players used to do it using powered rails or activator rails which worked until 22w11a of 1.19 but 22w12a fixed this bug[1].

Videos
SB737 builds an end of light mob farm in hardcore mode.