To get started with the creation of the portal, you will need at least 16 ironslate blocks.
Each ironslate block requires 5 deepslate and 4 iron.
In total, you will need 64 iron ingots and 80 deepslate.

The next thing you need is a TBBC gem. This gem ignites the portal. It requires
one lapis block, one diamond block, one iron block, one redstone block, one obsidian block,
one gold block, one copper block, one emerald block, and one coal block.

The portal looks like this. It is a 5x5 flat portal made of ironslate.
It is ignited by a TBBC gem, similar to a nether portal.