An ATM like mining dimension for vanilla ores, probably a bit unbalanced.
The dimension is in layers, with each layer holding the respective ore types for that layer, nether ores for netherrack for example, the first version had the order of stone, netherrack, deepslate, but later versions will be stone, deepslate, netherrack.
To make the portal you need to craft the portal blocks (cracked stone bricks surrounding a diamond needing a minimum of 10) and assemble them like a nether portal, then you light it using a diamond pickaxe instead of a flint and steel.
uses the https://github.com/kyrptonaught/customportalapi for the portal.
any suggestions are welcome! do so from the link issues please. If I add it I'll credit you in the changelog.