Minecraft version: 1.21 and up
Modloader: Forge / Fabric

Feature description

The idea of this mod is based on Mc dev statement about vault designed so they can be used in any structures by dev/modders/and player who wan to customize them. So what i want to pitch in here is to make vault can appear in some more structures with their own keys. And these keys can be obtained via different way. The amount of vault generated on these structure and what loot they have is up to dev. But its good if the loot is datapackable tho

Structures and Its key
Ocean Monument: Prismarine key, Dropped from Elder Guardian
Desert Temple: Ancient Key, Obtained from Desert Temple Archeology
Nether Fortress: Infernal Key, Obtained from Fortress Chest loot
Mansion: Vex Key, Rare Drop from Evoker
Stronghold: Stronghold Key, Obtained from Stronghold Chest Loot
End Ship: Shulker Key, Rare Drop from Shulker

Also since the point of vault keys is that theyre supposed to be renewable. I think you can make like an alternative way to obtained it using trial keys and convert it into other keys by crafting them with item material that related to that structures (Like shulker box for End Ship, or Ender Eye for Stronghold)