A "raid farm". All the mobs which take part in the raid are pushed into the nether for collection, killing and processing.
There are some limitations which I've explained in the YouTube video.
There is a separate schematic for the nether build (make sure the nether portals are linked properly)

Pros
- Automatic raid ending
- All raid mobs are trapped - they can be used for traps, farms, pranks and for getting bad omen in the future with ease.
- Using TNT you can also get the Looting 3 effect without needing a sword.
Limitations
- No "hero of the village".
- Ravagers are killed (most of them, some can be salvaged)
- Sometimes does not trigger the raid - need to get Bad Omen twice.