"The Forgotten Depths" Update

We should have more underwater mobs. Maybe an underwater city perhaps would be cool to have as well in the overworld. We have copper lets make more use of it, perhaps we could make diving suits out of copper possibly we can use air charges for oxygen? Now the new mobs for said underwater city we could have new enemy mobs. That being like an underwater ruler of said city. Now we don't have to call this city "Atlantis" maybe we could call these towns, cities, kingdom, whatever you choose it could be called "Altana" it's not "Atlantis" for this place is different. Let the people decide why this place exists. For the name of this update, it could be called, "The Forgotten Depths". Sorry I went off track from the enemies. So, we already have guardians, they could guard the place. As for the new enemies they could be like the protectors of the place. Protecting the treasure that lays right in the middle of the place. That treasure being two new items, that item allowing you to infinitely breathe underwater once equipped. It's a head or back gear for you or it could be a left-handed gear. The second one being a way better trident, one that looks nothing like the others. Once you have it on hand you can swim faster and once you throw the trident, it should already come back to you without an enchantment. Now obviously with this new town/city/kingdom. There will be new lights and blocks for those builders like me to create and use, specifically new ancient types of blocks and lights.