The Artis

The artis is a mod that aims to add an end like dimension to the game that represents Limbo in the same way the Nether represents Hell
This dimension is surface resource-rich, making it easier to mine up and have an excess of early game ores like iron  and coal

It was mad with https://mcreator.net/ but if it gains enough traction ill keep it up to date (it might just be a one-off mod)

The Process of entering the Artis;

you must find "ardus" ore underground in the overworld, this will give you "ardus shards"
four of these plus a bucket of lava produce a single "ardus"
you must combine the "ardus" with a "lost soul" you can acquire by smelting soulsand.
the "Infused Soul" will be used to ignite the portal.
the portals frame will be made from "Ardus Infused Soulsand"

 which can be crafted from two "ardus" and a piece of soulsand in a crafting table

after constructing the frame like a nether portal, use the "infused soul" like a flint and steel and ignite the portal