This is Soulful Nether, a mod that is workin' to upgrade the nether
Soulful Nether adds a Fright Forest, the Fright Forest is a netherwart forest based in the Soul Sand Valley;
The second current biome is the Ashen Deltas, its what would happen if the basalt deltas were based in souls (Looks like ive got a theme starting),
The third biome is the Gloomy Glades, a Warped Forest sub-biome with a yellow/cyan theme and no souls to be found
Soulful Nether also adds Soulroots! you get them from planting beetroots in Soul Sand/Soul Soil or Lichoss
And our first mob; the Bone Wyrm!
I most likely wont be porting my mod for a while, though it's something I'm interested in doing
well, I'm planning on making compat in the future for stuff like more Soulroot Foods!
Currently the existing compat is:
Farmers Delight (adding Soulroot Crates of every type)
Jadens Nether Expansion (adding Frostbitten Soulroots and Frostbitten Popsicles)
ThatJadenXgamer - help on some Mixins, Java classes, and ideas
DigitalPear - help on Terrablender dependancy setup and some Mixins

Soulful Nether is a small project that focuses on making the nether a bit more nice!