Toxic Plateau - a Nether biome

I had a dream like about 23 days ago where there was a highlight showcase of 1.20 where it showed 2 biomes; the Savanna, and bizarre toxic nether biome. This biome has some kind of huge fungus where it is white and like about 20 blocks tall. The bizarre part is where there's a toxic cloud hovering about 50 blocks over each one of this bizarre tall white huge fungi. This toxic cloud is really scary at first, is amplified by how much of the white wart blocks there are, and seemed like the shroomlight at the top of the trunk is powering the toxic cloud. This toxic biome that was showcased was on a small island that was about 62 blocks big. Also, the nylium of this biome is green.

I thought this feature is great for when archaeology is added. This biome could have gravel that you can sweep away to discover Nether artifacts.