The Hollow Dimension

This new end game dimension will be accessed by activating the portal frame in ancient cities. Lore wise, this dimension is the origins of how souls, wither and undead came to the overworld and is the true underworld of the overworld, since the nether is confirmed to be an entire different dimension. The terrain of this dimension will be similar to the nether, being one gigantic cave full of undead and elderich monsters of horror, that being said, horror would be the perfect theme for this dimension due to its lore and being an optional choice, meaning that if the player doesn’t like horror, they can choose not to enter and are not required to. In this dimension a new variety of biomes like wither forests, bone biomes can be found with new structures and items found exclusively (example, a new utility block called the amalgamator, which can fuse blocks/items together, or a new catacomb structure).