This is proof of concept I discovered last night, so I shared it to simply separate Zombies villagers you can cure.

How does it work?
Zombies have the same IA, killing villager, break turtle eggs, walking etc.
Normal zombies can sink, not zombie-villagers. So, we sink normal zombies and at the night, drowned swim up, villagers does not move at all because they can't swim.

We just need to prevent drowned to swim down again at daytime and that's it.

You can:
- Separate Zombie villagers from Zombies.

To use it
1) Summon zombies with command bloc on your right
1) Put the mincart lever on to fill the system
3) Wait 1m
4) Set the time on night




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Made by me.
Thanks to credit me if you make it a video, claim this machine as yours is totally forbidden.