This datapack/mod add 6 new biomes to minecraft (more are planned) :
This biome will appear when a cliff is above an ocean, making this amazing looking calcite cliff. 
This rare biome is a variation of the warm ocean, it will generate a dying coral reef, with only a few blocks of living coral left. 
This (also) rare biome will only generate in deep cold oceans, especially near mushroom islands, you can recognise it by the strange shapes made of prismarine, almost like it was something... alive ? You can easily spot it from the surface due to prismarine trees sometimes generating a sea lantern at the center of their roots. 
Generating where the humidity is high, this new biome is very common in the underground, the ground is covered by mycelium and mushrooms, some of them have grown into huge mushrooms that can emit light. Due to the light of the mushrooms, this biome is safer than most of the underground. Also mycelium won't generate when ores are placed, so this biome is perfectly viable for cave mining. 
The first variation of the deep dark, this deadly biome have a lot of magma patches, but is really rare, this biome only generate where deep dark would have generated so it won't add more overall sculk to the underground. 
The second variation of the deep dark, this biome is filled with ice, replacing deepslate everywhere, and like the burning dark, this biome only generate where deep dark would have generated so it won't add more overall sculk to the underground. 
If you have any issue/question, contact me on discord! (@nugrevan) : https://discord.gg/SxarRKTw8k, any feedback will be greatly appreciated, thanks !
