This forest can be found in the Nether, it works similar like Crimson and Warped Forests, but unlike the others, huge fungus can also spawn in lava lakes, which name is Spectral Fungus, these fungus has Spectral Wart (purple wart), Spectral Stem (purple wood, which also works like the other 2 fungus) rough vines (purple vines) and shroom light.
The Biome has purple particles moving around the Biome, same as Crimson and Warped Forests.
we can also find rough vines, these can grow from down to upside, and from up to downside.
In this Biome can also spawn Hoglins, Endermen, Striders and there's a little chance you can see a wither skeleton in here too.
The ground is covered by Spectral Nylium (purple Nylium), which works like the Crimson and Warped ones.
The fog (sky) in here is deep and dark blue, It makes it very terrifying.