Description
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The Nether has always been dangerous... but it's never been this alive.
Pyrellium is a content-rich expansion mod that introduces 9 brand new biomes, seamlessly integrated with the vanilla Nether for a natural and immersive experience. Whether you're an explorer, builder, or survivalist, Pyrellium offers new challenges and rewards deep within the fiery realm.
Flaming Forests
Discover blazing biomes, and obtain new spoils. But watch out, even the flora is out to harm you.
Icy Depths
Find chilling places where frostbite meets fire. These treacherous frozen lands are as beautiful as they are deadly.
Spider Sanctuaries
Venture into eerie caverns where intelligent spiders spin homes of silk and secrets. Tread carefully. You're not alone.
Calming hopes
Not every biome is deadly, venture into the crystal forest to enjoy lands of beauty. and take a break from the danger.
And More!
Click the image below to be taken to Bisect's website
Forge?
Pyrellium is fully compatible with sinytra connector, use that for playing pyrellium on forge.
Since version 0.4.0, Pyrellium does have a native neoforge version for minecraft 1.21.1
Is this compatible with X mod?
Pyrellium was built with compatibility in mind. It works alongside all major Nether mods and fits naturally into both vanilla and modded environments.
Will you be adding more biomes or features?
Pyrellium is currently in beta, this means more features are on the way. Adding more biomes itself will be unlikely, but stay tuned for new mobs, items, and other features.
Hey this looks a lot like Lankasters Nether.
Yes. Pyrellium started as Lankasters Nether, but eventually grew to big to be just a datapack, and it was decided to switch over to making a mod. Lankasters Nether is still available as it's own project for archiving purposes, but it is recommended where possible to use Pyrellium instead.
All Versions
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[0.4.1-1.21.1-neo] Pyrellium 0.4.1-1.21.1-neo
by Lankaster on Oct 08, 2026
Download
## This update alters world generation, be sure to back up your world when updating
- Added Packed Black Ice
- Significantly adjusted the generation of Frostburn Valley
- All Pyrellium flora can be composted now
- Improved the handling of nether carvers for the
replace_wallfeature - Added a 5% chance for skeletons in the nether to spawn with amethyst/opal arrows (configurable)
- Added a config option to disable the freezing effect from standing on black ice
[0.4.1-1.21.11] Pyrellium 0.4.1-1.21.11
by Lankaster on Oct 05, 2026
Download
## This update alters world generation, be sure to back up your world when updating
- Added Packed Black Ice
- Significantly adjusted the generation of Frostburn Valley
- All Pyrellium flora can be composted now
- Improved the handling of nether carvers for the
replace_wallfeature - Added a 5% chance for skeletons in the nether to spawn with amethyst/opal arrows (configurable)
- Added a config option to disable the freezing effect from standing on black ice
[0.4.1-1.21.1] Pyrellium 0.4.1-1.21.1
by Lankaster on Oct 05, 2026
Download
## This update alters world generation, be sure to back up your world when updating
- Added Packed Black Ice
- Significantly adjusted the generation of Frostburn Valley
- All Pyrellium flora can be composted now
- Improved the handling of nether carvers for the
replace_wallfeature - Added a 5% chance for skeletons in the nether to spawn with amethyst/opal arrows (configurable)
- Added a config option to disable the freezing effect from standing on black ice
[0.4.1-1.20.1] Pyrellium 0.4.1-1.20.1
by Lankaster on Oct 05, 2026
Download
## This update alters world generation, be sure to back up your world when updating
- Added Packed Black Ice
- Significantly adjusted the generation of Frostburn Valley
- All Pyrellium flora can be composted now
- Improved the handling of nether carvers for the
replace_wallfeature - Added a 5% chance for skeletons in the nether to spawn with amethyst/opal arrows (configurable)
- Added a config option to disable the freezing effect from standing on black ice
[0.4.0-1.21.1-neo] Pyrellium 0.4.0-1.21.1-neo
by Lankaster on Sep 24, 2026
Download
Native Neoforge port
If you encounter any issues, please report them to the [issue tracker](https://github.com/Theawsomelamp/pyrellium/issues)
If you encounter any issues, please report them to the [issue tracker](https://github.com/Theawsomelamp/pyrellium/issues)
[0.4.0-1.21.11] Pyrellium 0.4.0-1.21.11
by Lankaster on Aug 14, 2026
Download
## This update alters world generation, be sure to back up your world when updating
For the people that were using different biome placement trough config, check out https://github.com/Theawsomelamp/pyrellium/wiki/Config-&-Datapack#biome-placement
- Overhauled the generation of quartz caverns
- Added rough quartz, quartz buds, and budding quartz
- Added quartz cracks
- Changed surface rules to include rough quartz and apply to ceiling
- Made spikes generate in larger sizes and on the ceiling too
- Added the Geodin mob
- Geodins come in three variants, amethyst, opal, and quartz, and grow a crystal of their respective material
- Crystals can be harvested at any growth stage by right clicking with a pickaxe, where it will drop the loot for the growth stage (taking enchants into account)
- When trapped for a bit, geodins will turn into sleeping geodins, a block form that does many of the same things
- Sleeping geodins turn back into the mob when broken, retaining things like name, and also becoming persistent
- Geodins naturally spawn in crystal forest and quartz caverns
- Changed the loot table of quartz crystal to match the biome overhaul
- Improved tags for the mod
- Moved the biome placement configuration out of the config file, in favour of having it controlled by datapack
- Significantly reduced world gen lag in monolith plains
For the people that were using different biome placement trough config, check out https://github.com/Theawsomelamp/pyrellium/wiki/Config-&-Datapack#biome-placement
[0.4.0-1.21.1] Pyrellium 0.4.0-1.21.1
by Lankaster on Aug 14, 2026
Download
## This update alters world generation, be sure to back up your world when updating
For the people that were using different biome placement trough config, check out https://github.com/Theawsomelamp/pyrellium/wiki/Config-&-Datapack#biome-placement
- Overhauled the generation of quartz caverns
- Added rough quartz, quartz buds, and budding quartz
- Added quartz cracks
- Changed surface rules to include rough quartz and apply to ceiling
- Made spikes generate in larger sizes and on the ceiling too
- Added the Geodin mob
- Geodins come in three variants, amethyst, opal, and quartz, and grow a crystal of their respective material
- Crystals can be harvested at any growth stage by right clicking with a pickaxe, where it will drop the loot for the growth stage (taking enchants into account)
- When trapped for a bit, geodins will turn into sleeping geodins, a block form that does many of the same things
- Sleeping geodins turn back into the mob when broken, retaining things like name, and also becoming persistent
- Geodins naturally spawn in crystal forest and quartz caverns
- Changed the loot table of quartz crystal to match the biome overhaul
- Improved tags for the mod
- Moved the biome placement configuration out of the config file, in favour of having it controlled by datapack
- Significantly reduced world gen lag in monolith plains
For the people that were using different biome placement trough config, check out https://github.com/Theawsomelamp/pyrellium/wiki/Config-&-Datapack#biome-placement
[0.4.0-1.20.1] Pyrellium 0.4.0-1.20.1
by Lankaster on Aug 14, 2026
Download
## This update alters world generation, be sure to back up your world when updating
For the people that were using different biome placement trough config, check out https://github.com/Theawsomelamp/pyrellium/wiki/Config-&-Datapack#biome-placement
- Overhauled the generation of quartz caverns
- Added rough quartz, quartz buds, and budding quartz
- Added quartz cracks
- Changed surface rules to include rough quartz and apply to ceiling
- Made spikes generate in larger sizes and on the ceiling too
- Added the Geodin mob
- Geodins come in three variants, amethyst, opal, and quartz, and grow a crystal of their respective material
- Crystals can be harvested at any growth stage by right clicking with a pickaxe, where it will drop the loot for the growth stage (taking enchants into account)
- When trapped for a bit, geodins will turn into sleeping geodins, a block form that does many of the same things
- Sleeping geodins turn back into the mob when broken, retaining things like name, and also becoming persistent
- Geodins naturally spawn in crystal forest and quartz caverns
- Changed the loot table of quartz crystal to match the biome overhaul
- Improved tags for the mod
- Moved the biome placement configuration out of the config file, in favour of having it controlled by datapack
- Significantly reduced world gen lag in monolith plains
For the people that were using different biome placement trough config, check out https://github.com/Theawsomelamp/pyrellium/wiki/Config-&-Datapack#biome-placement
[0.3.3-1.21.11] Pyrellium 0.3.3-1.21.11
by Lankaster on Jun 25, 2026
Download
Giving the 1.21.11 version some proper care
- Added shelf blocks to the Burning and Shaderoot woodsets, making them up to date with vanilla ones
- Fixed the recipe for the chain fence still using
chainand notiron_chain, thus failing to load - Fixed
raised_nether_heightnot working at all - Improved audio and visual feedback from the rebound enchantment
- Added the ability to right click harvest bomb plants when holding shears or an item with silk touch (the same requirements for harvesting when breaking)
[0.3.3-1.21.1] Pyrellium 0.3.3-1.21.1
by Lankaster on Jun 25, 2026
Download
- Improved audio and visual feedback from the rebound enchantment
- Added the ability to right click harvest bomb plants when holding shears or an item with silk touch (the same requirements for harvesting when breaking)
[0.3.3-1.20.1] Pyrellium 0.3.3-1.20.1
by Lankaster on Jun 25, 2026
Download
- Improved audio and visual feedback from the rebound enchantment
- Added the ability to right click harvest bomb plants when holding shears or an item with silk touch (the same requirements for harvesting when breaking)
Additionally, 1.20.1 versions will have a version suffix from now on like the other versions
[0.3.2-1.21.11] Pyrellium 0.3.2-1.21.11
by Lankaster on Jun 11, 2026
Download
## This update alters world generation, be sure to back up your world when updating
- Added an enchantment: Rebound
- Rebound is a sword enchant that can redirect projectiles, higher levels increase velocity
- 3 levels, incompatible with knockback (configurable)
- Added a new structure, the Ghostly Graveyard
- Added the Chain Fence
- Added Basalt Iron Ore
- Slighty reworked the generation of the Blackstone Springs biome
- Fixed Drained Soul Soil having an incorrect block loot table
- Fixed Shaderoot Doors being able to see trough the world in specific circumstances
[0.3.2-1.21.1] Pyrellium 0.3.2-1.21.1
by Lankaster on Jun 11, 2026
Download
## This update alters world generation, be sure to back up your world when updating
- Added an enchantment: Rebound
- Rebound is a sword enchant that can redirect projectiles, higher levels increase velocity
- 3 levels, incompatible with knockback (configurable)
- Added a new structure, the Ghostly Graveyard
- Added the Chain Fence
- Added Basalt Iron Ore
- Slighty reworked the generation of the Blackstone Springs biome
- Fixed Drained Soul Soil having an incorrect block loot table
- Fixed Shaderoot Doors being able to see trough the world in specific circumstances
[0.3.2] Pyrellium 0.3.2
by Lankaster on Jun 11, 2026
Download
## This update alters world generation, be sure to back up your world when updating
- Added an enchantment: Rebound
- Rebound is a sword enchant that can redirect projectiles, higher levels increase velocity
- 3 levels, incompatible with knockback (configurable)
- Added a new structure, the Ghostly Graveyard
- Added the Chain Fence
- Added Basalt Iron Ore
- Slighty reworked the generation of the Blackstone Springs biome
- Fixed Drained Soul Soil having an incorrect block loot table
- Fixed Shaderoot Doors being able to see trough the world in specific circumstances
[0.3.1-1.21.11] Pyrellium 0.3.1-1.21.11
by Lankaster on Apr 12, 2026
Download
- Update to 1.21.11
[0.3.1-1.21.1] Pyrellium 0.3.1-1.21.1
by Lankaster on Mar 26, 2026
Download
- Added the
bomb_plant_safeentity tag - Entities in this tag will not trigger a bomb plant on collision
- By default contains: Silverfish, Endemites, Allay, Vex, Bees and Bats
- Added config options to disable placeable vanilla bones and wall mushrooms
- Made pyrellium surface rules able to be edited by datapack
[0.3.1] Pyrellium 0.3.1
by Lankaster on Mar 26, 2026
Download
- Added the
bomb_plant_safeentity tag - Entities in this tag will not trigger a bomb plant on collision
- By default contains: Silverfish, Endemites, Allay, Vex, Bees and Bats
- Added config options to disable placeable vanilla bones and wall mushrooms
- Made pyrellium surface rules able to be edited by datapack
[0.3.0-1.21.1] Pyrellium 0.3.0-1.21.1
by Lankaster on Mar 03, 2026
Download
## This update alters world generation, be sure to back up your world when updating
- Overhauled the Ghostly Woods biome
- Added the shaderoot woodtype
- Retextured ghostly leaves, and added flowering ghostly leaves and ghostly vines
- Added drained soul soil and wispbloom
- Reworked the generation of the ghostly woods biome
- Added Opal Spyglass sharing
- Using
pickblock(middle click by default) while using the opal spyglass, the currently marked block can be shared with nearby players, for who it will render with a purple outline. - Fixed a client crash caused by using
pickblockon a pyrellium boat - Added tooltips to items whose functions might not have been immediately clear.
- Added config options:
spores_effect,spores_effect_time,opal_spyglass_block_sharing,mushroom_cap_effect_multiplier,mushroom_cap_effects,crystal_arrow_shatter_radiusandcrystal_arrow_shatter_damage
[0.3.0] Pyrellium 0.3.0
by Lankaster on Mar 03, 2026
Download
## This update alters world generation, be sure to back up your world when updating
- Overhauled the Ghostly Woods biome
- Added the shaderoot woodtype
- Retextured ghostly leaves, and added flowering ghostly leaves and ghostly vines
- Added drained soul soil and wispbloom
- Reworked the generation of the ghostly woods biome
- Added Opal Spyglass sharing
- Using
pickblock(middle click by default) while using the opal spyglass, the currently marked block can be shared with nearby players, for who it will render with a purple outline. - Fixed a client crash caused by using
pickblockon a pyrellium boat - Added tooltips to items whose functions might not have been immediately clear.
- Added config options:
spores_effect,spores_effect_time,opal_spyglass_block_sharing,mushroom_cap_effect_multiplier,mushroom_cap_effects,crystal_arrow_shatter_radiusandcrystal_arrow_shatter_damage
[0.2.6-1.21.1] Pyrellium 0.2.6-1.21.1
by Lankaster on Dec 17, 2025
Download
## This update will reset your config, if you changed the values, you will have to redo them
- Added the ability to alter biome placement of Pyrellium biomes trough config
- Uses the same values as vanilla biome placement
- Fixed an issue with datapack priority that could have datapacks disabling Pyrellium biomes unknowingly
- Sneaking while marking a block with the opal spyglass will now remove the previous marked block without marking the selected block.
[0.2.6] Pyrellium 0.2.6
by Lankaster on Dec 17, 2025
Download
## This update will reset your config, if you changed the values, you will have to redo them
- Added the ability to alter biome placement of Pyrellium biomes trough config
- Uses the same values as vanilla biome placement
- Fixed an issue with datapack priority that could have datapacks disabling Pyrellium biomes unknowingly
- Sneaking while marking a block with the opal spyglass will now remove the previous marked block without marking the selected block.
[0.2.5-1.21.1] Pyrellium 0.2.5-1.21.1
by Lankaster on Nov 16, 2025
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Hotfix
- Fixed pyrellium destroying parts of the bedrock roof and floor in certain configurations
[0.2.5] Pyrellium 0.2.5
by Lankaster on Nov 16, 2025
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Hotfix
- Fixed pyrellium destroying parts of the bedrock roof and floor in certain configurations
[0.2.4-1.21.1] Pyrellium 0.2.4-1.21.1
by Lankaster on Nov 12, 2025
Download
- Fixed a crash when firing an amethyst/opal arrow from a dispenser (again)
- Fixed a rendering issue where opal arrows would have the texture and emit the particles of an amethyst arrow
- Added a few missing tags
- Additional improvements to nether and world gen mod compatiblity
- Fixed the dragon fossil structure not properly generating
- Allowed the dragon fossil structure to spawn in soul sand valley
[0.2.4] Pyrellium 0.2.4
by Lankaster on Nov 12, 2025
Download
- Fixed a crash when firing an amethyst/opal arrow from a dispenser (again)
- Added a few missing tags
- Additional improvements to nether and world gen mod compatiblity
- Allowed the dragon fossil structure to spawn in soul sand valley
[0.2.3-1.21.1] Pyrellium 0.2.3-1.21.1
by Lankaster on Oct 14, 2025
Download
## This update alters world generation, be sure to back up your world when updating
- Added a config option to disable the increased nether height from Pyrellium
- This option will be ignored when another mod/datapack alters the nether height/shape
- Any changes Pyrellium makes the the shape of the nether will now be considered "weak"
- This means other mods/datapacks affecting the nether shape will be given priority
- Improved compatablity with most nether biome and world gen mods
[0.2.3] Pyrellium 0.2.3
by Lankaster on Oct 14, 2025
Download
## This update alters world generation, be sure to back up your world when updating
- Added a config option to disable the increased nether height from Pyrellium
- This option will be ignored when another mod/datapack alters the nether height/shape
- Any changes Pyrellium makes the the shape of the nether will now be considered "weak"
- This means other mods/datapacks affecting the nether shape will be given priority
- Improved compatablity with most nether biome and world gen mods
[0.2.2-1.21.1] Pyrellium 0.2.2-1.21.1
by Lankaster on Aug 14, 2025
Download
## This update alters world generation, be sure to back up your world when updating
- Changed freezing ice into black ice
- Also altered the freezing overlay accordingly
- Added headstones, naturally generating in ghostly woods
- Added mushroom cap
- Retextured and altered placement of quartz crystals
- Fixed bones and wall mushrooms being able to replace blocks under certain circumstances
[0.2.2] Pyrellium 0.2.2
by Lankaster on Aug 14, 2025
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## This update alters world generation, be sure to back up your world when updating
- Changed freezing ice into black ice
- Also altered the freezing overlay accordingly
- Added headstones, naturally generating in ghostly woods
- Added mushroom cap
- Retextured and altered placement of quartz crystals
- Fixed bones and wall mushrooms being able to replace blocks under certain circumstances
[0.2.1-1.21.1] Pyrellium 0.2.1-1.21.1
by Lankaster on Jul 30, 2025
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- Added a config option to disable the thicker bedrock roof Pyrellium adds
- Fixed the opal spyglass rendering incorrectly when used in offhand
