Swamp update: city of Witches

Swamp Update: City of Witches The swamp of Minecraft I have always noticed that it is a bit bare, it is true inside you can find the witch's house, but I would like an update of the swamp, in which you could find an underground city (the entrance would be in the water ) where you can find a real witch town (different from the villages we are used to) I would like there to be even more varieties of witches, for example one who casts spells, or a boss witch. I would also like to implement potions in cauldrons on Java as well thank you