Even though my last suggestion is still fresh out the creative forge here I am with another one.
Instead of the HFS being a simple barren wasteland of slade and series glowing pits, I feel that it should have more diversity in biomes. And also something to differentiate it from caverns. Cant have more forgotten beasts winding up in the wrong type of cavern and getting beaten up by clowns again huh...
[BIOME:UNDERWORLD_CHASM]
This biome is quite literally the current HFS we all know. A barren hilly area of slade containing many, MANY eerie glowing pits. Luckily, this is the only biome to contain this many of those damned pits. God I hate it when ignorant fighters just dodge into these and instadie...
Only inorganic demons can spawn here, with the occasional organic demon(very rare though).
[BIOME:UNDERWORLD_FOREST]
A forest of Hellgrass and demonic trees, populated by the largest concentration of demons compared to other biomes. Also has harvestable fruits and plants, if you dare brave the clowns. All demons can spawn here. Situated over a layer of Slade Dust, basically Slade that was eroded over time by vegetation and clowns trampling it.
[BIOME:UNDERWORLD_SEA]
A great ocean of boiling lava, these oceans are bordered by beaches of Slade Dust. Don’t dip your toes in the magma, they aint coming back up.
Predominantly fire-based or fire-breathing demons will spawn here, with some exceptions to other inorganic demons.
[BIOME:UNDERWORLD_BARREN]
Basically UNDERWORLD_CHASM except without the chasms. Nothing grows here, and the land is populated by inorganic demons, though organic demons may also pop up.
[BIOME:UNDERWORLD_PLAIN]
A vast plain of flesh-based flora. All organic demons have a chance of popping up here while the rate of inorganic demons is lowest.
[BIOME:UNDERWORLD_SPHERE]
[UNDERWORLD_SPHERE_TYPE:(sphere)]
Special biomes that are connected magically to different spheres(usually evil/dark-aligned spheres). Currently, only DEATH, NIGHT, SUICIDE, DARKNESS and BLIGHT are inside. Flora are related to their biome’s sphere(eg. Miasmic Grama, a type of grass that can emit miasma-like pollen clouds). All kinds of demons can spawn in these biomes.
A few flora from the Underworld, namely [UNDERWORLD_FOREST] and [UNDERWORLD_PLAINS].
Satan’s Fan
A large, saguaro-like red tree that doesn’t produce any fruits and serves mostly to look cool and for wood. It has no leaves.
“A large red tree with vast branches and no leaves. It looks similar to a fan coral/a fan, hence its name.”
Crimson Hand
A large tree that can produce fruits, called Demon’s Fingers. These fruits can be brewed into Hell’s Elixir, the most expensive alcohol in the land(tied with all other Underworld-made wines). They can also be cooked.
“A large crimson tree with a large, overreaching crown and small spike-like leaves. It grows curious lean fruits, resembling large chilis, which drop on the floor periodically. These fruits are long and gnarled, resembling the fingers of some demons, hence their name. The tree’s branching structure makes it look like a mass of hands reaching out from the stem, hence the name Crimson Hand.”
Clownroot
A cookable root. When generated, it can appear any colour randomly in the spectrum.
“An unusually cheerful plant in comparison to the bleak red or dark tones of the rest of the Underworld. It’s small crown of red leaves belie a massive, multi coloured root with red bulbs. Some say it looks eerily similar to some self-dyed performers, colloquially known as ‘clowns’. They probably didn’t have enough alcohol.”
Boiling Cress
Can be used for...cooking?
“An Underworld relative of the Garden Cress, it’s neon red leaves feel hot to the touch. It can very seriously burn anything it contacts.”
Sootweed
Grass cover.
“A gray plant with small, rounded leaves. The leaves have the texture of ash and the flowers glow like embers in a fireplace. Leaves can be broken easily.”
[UNDERWORLD_PLAINS]
Goretree
A tree that can drop fruits that are cookable, Gorefruit.
“A large tree with large leaves, it’s crown is packed so tightly that it resembles a giant lump of gore. It’s fruits, known as Gorefruits, have an unusually high concentration of plant-based proteins, making them regrettably unbrewable.”
Flesh Growth
A weird tree that can be eaten from logs. Yeah, weird.
“A ‘tree’ that is pretty much a mass of flesh and bone. It absorbs the evil energies around it to grow and propagate itself through runners.”
Flesh Bulb
Can be harvested for 1 Meat Bulb(cookable only).
“A small, harvestable bulb of flesh surrounded by a small crown of tiny red leaves.”
Underblade Reed
Ground Cover. Can injure the feet of any dwarves walking over it without shoes/socks.
“A vicious plant with thin, sharp leaf blades. They are razor-sharp and can easily pierce flesh.”
[UNDERWORLD:SPHERE]
Each Underworld Sphere biome will contain 1 unique tree, 3 unique grass-type plants(serve similar functions to cave moss and grass), and 3 special plants(harvestable/interacts). Below are a few examples:
Miasmic Grama
Occasionally releases bursts of miasma into the air, which acts as normal miasma.
“A small, purple ground cover plant, a denizen of the Death Sphere biomes. As a form of reproduction, it releases large clouds of purple pollen into the air, which unfortunately causes all of the same effects as actual miasma.”
Duskbalm
Can harvest Dusk Balls from this plant, which can be brewed into Black Broth.
“A curious vine-like plant, from it’s end sprouts a large black bulb which seems to attract light instead of emitting it. Staying near to it makes one feel uneasy; regardless, the dwarves brew it just fine. A native of the Darkness Sphere biomes.”
Blight Bloom
Can cause sickness in those with open wounds that walk on it.
“A seemingly diseased, rotting bloom that spreads deadly pathogens around it, using its pollen as a hitchhiking device. A denizen of the Blight Sphere biomes, it’s sickly yellow leaves and dull brown petals fit in perfectly with the rest of the putrid plants.”