Nexus Infection
Java mod listed for Minecraft 1.17–1.21. File opened and checked on 5 Oct 2026; downloads from the MC Java Mods app on Android.
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Explore the Overworld with infested structures, biomes and obtain items filled with Nexus energy.
Geckolib: https://www.curseforge.com/minecraft/mc-mods/geckolib
Start of the Infection:
The First Signs: Visitors
When logging into your world everything seems fine at first, but as soon as you place a bed, otherworldly creatures may visit you during the night.
These Visitors are strong hostile mobs who can spread the Nexus and can also spawn other mobs related to the infection. One of these is the Infector, a mob capable of spawning Nexus Tumors.
Nexus Tumors and the Spread:
Nexus Tumors rapidly spread the Nexus Infection across large areas, transforming them into hostile microbiomes. When a Tumor appears, it begins corrupting the terrain beneath it, converting the ground into masses of Dead Nexus.
While the Tumor is alive, Red Cacti, Nexus Roots, Mind Saplings, and Nexus Meat can naturally form on top of Dead Nexus blocks.
Mind Saplings grow into massive Mind Trees after roughly 2 minutes, while Nexus Meat can spawn Wreckeds or Infectors. Infectors spawn new Nexus Tumors, allowing the infection to spread even further.
If you're near the infection, a red fog will appear.
The infection can overtake some animals, turning them into hostile undead mobs that target other animals and spread the infection across the world.
Nexus Hives:
Once a Nexus Tumor finishes corrupting its surroundings, it dies and creates a Nexus Hive underground if there is enough space. Nexus Hives have 2 variants: Grand and Small. Grand Hives are created when there are no Torment Tentacles in a 100×100×100 block area.
Small Hives are created when there is at least one Torment Tentacle in that area.
Grand Hives feature Heartlens, Nexium Cores, Hive Blobs, and a Hive Root, which can be used to summon the Torment Root with a Nexium Heart. Small Hives feature only Heartlens and Nexium Cores.
The Coarse:
Once a Nexus Hive is spawned, the infection enters its 2nd stage, and Dead Nexus begins spreading the Coarse, a block created when Dead Nexus spreads while a Nexus Tumor or Infector is within a 100×100×100 area. The Coarse spreads while a Heartlen is within a block area of 200×200×200, creating Coarse Spikes, Dead Nexus Roots, Radiant Mushrooms, Nexus Meat, Nexus Acid, and large Nericin Tentacles.
The Hive Root:
Within Grand Hives there is a Hive Root block. It is the Heart of the Hive that emits heartbeat sounds, and is used to summon the Torment Root with a Nexium Heart, which can be crafted from 3 Nexium and a Heartlen Piece, both of which can be looted from the hive.
The Torment Root is a mini‑boss that drops a Nexium Tentacle, which can be used to convert Nexium into a Nexium Ingot using a Nexium Tentacle and 8 Nexium.
(Note: the Nexium Tentacle is not consumed when crafting a Nexium Ingot.)
The Nexium Tentacle can also be used to break Nexus-type blocks instantly.
Nexium Ingots can be used to craft Nexium Marks using 2 Nexium Ingots and 7 Cobblestones.
Nexium Marks prevent Visitors and Infectors from spreading the Nexus in a 60×60×60 area (Note: Infectors can still spawn Nexus Tumors.)
They also prevent Coarse and Dead Nexus blocks from spreading within a 50×50×50 area.
Nexium can also be used to craft Nexium Hexas, which can be used to infect mobs.
One can be crafted using 2 Nexus Skins, a Coarse Spawner that grows on top of Coarse Spikes, and a Nexium Ingot.
Players can also create a Tumor: just kill a Nexus using a Nexus Amulet, then use a Bucket on the resulting Dripping Nexus to make a Tumor Nexus block that will spawn a Tumor.
Each Nexus Tumor has a variable lifespan.
In biomes where Villages can be found such as plains, deserts, savannas, and taigas you can find Infected Outposts, which are inhabited by Blasters (Infected Pillagers).
On the top, you'll find a chest that can contain up to 2 Blaster Crossbows, which are new ranged weapons. They can also be obtained by killing Blasters who have Blaster Crossbows equipped.
Blaster Crossbows shoot Bone Thorns instantly and have 366 durability. Bone Thorns can be crafted using Bone Shards.
In biomes like savannas and swamps, you can find the Overgrown Castle, which has been completely overtaken by an infection spreading through the Overworld. Inside, you’ll discover a locked chest that can be opened with a Radiant Key.
The basement appears empty at first, but you’ll soon notice a villager trapped down there… or perhaps the villager is the trap.
Getting too close triggers a boss encounter with the Deceiver, who can be defeated by destroying nexus blobs while it is near them.
Upon defeat, the Deceiver drops a Nexus Amulet, which can be used in 3 different ways:
It can kill a Nexus to obtain Radiant Ash, freeze mobs while the player has Bone Shards in their inventory, or be used to craft a Cloudmaker.
The Cloudmaker is crafted using a Murk Nebula, a Nexus Amulet, a Water Bucket and 6 Polished Sinister Stones.
Note: The Nexus Amulet isn’t consumed when crafting the Cloudmaker. It only loses 1 durability, and the Water Bucket used in the recipe returns as an empty Bucket.
Peskies occasionally drop a Nexus Egg. Once hatched, it spawns a Murk, which drops a Murk Nebula when defeated. The Murk Nebula is a key material required to craft and operate the Cloudmaker. It generates magical clouds when activated with a Murk Nebula and if there is enough space 15 blocks above the block. Clouds created by the Cloudmaker begin to disappear after 50 seconds. They can be broken faster with a hoe, and the Ice Wand allows you to destroy them easily without needing to build up.
- Murk Clouds appear in non‑cold biomes and contain Murk Cloud Blocks, which are used to brew Blindness Potions. Nexus Clouds generate among the Murk Clouds and these can be used to craft throwable Murk Charges.
- Frozen Clouds form in cold biomes (such as snowy plains, snowy beaches, and snowy taigas). They are slippery, generate icicles, and drop Frost Chunks when mined.
- Candy Clouds are uncommon and drop a Cloud Candy when broken without Silk Touch. Cloud Candy is eaten quickly and restores 4 hunger points and 0.5 saturation.
- Golden Clouds are the rarest and drop 1-3 Gold Nuggets when broken without Silk Touch.
Nexadar Boss
If a Heartlen is active within a 100×100×100 area, and no Nexium Mark exists within 60×60×60, then the infection will generate its central avatar, a Humanoid Nexadar. This boss appears on the surface near the hive and, unlike other bosses in the mod, it can despawn.
It is able to clone itself to confure you, clones can be identified because they are slowed by the Nexus Amulet and they hold a slightly different weapon. It can be damaged using a Nexium Tentacle.
Once the humanoid form is defeated, it quickly forms a hive that summons the Nexadar’s true form, a powerful undead boss that keeps the infection active. You can also disable the infection by setting the nexusState gamerule to false.
When the Nexadar dies the Nexus Infection deactivates. This means:
-Visitors and Woundeds no longer spawn in the Overworld
-Dead Nexus, Coarse, and Dead Coarse blocks stop spreading
-Nexus Tumors cannot be spawned using Nexus/Nexium Amulets
-Innate Nexus blocks will no longer spawn infected mobs
-Acid Stalkers can no longer spawn from Stalker Disguise blocks
-Humanoid Nexadar bosses no longer spawn near the infection
-Nexus Blobs can be killed using a Nexus/Nexium Amulet, turning them into Dead Blobs, which drop up to 2 Withered Tissues when broken without Silk Touch
Nexus Blobs
Nexus Blobs naturally generate inside Nexus Hives, Overgrown Castles, and underground Jasper Hives that can generate between Y level 32 to -4.
Using 8 Withered Tissues and a Nexus Amulet you can craft a Reborn Blob.
Placing a Reborn Blob reactivates the Nexus Infection, while breaking it deactivates it again.
The Nexadar drops a Nexus Amulet Upgrade that is required to upgrade the Nexus Amulet along with a Nexium Ingot. The Nexium Amulet works similarly to the Nexus Amulet, but freezes mobs for longer in a larger area, and can also kill Nexus mobs more efficiently. It also has increased durability: 695 (compared to the Nexus Amulet’s 189)
Nexus Tumor:
A mob that rapidly spreads the Nexus Infection across large areas, forming a micro‑biome in the process. It can be spawned by Infectors and Players. It enables Dead Nexus to grow Red Cacti, Nexus Roots, Mind Saplings, and Nexus Meat within a 100‑block radius while alive. Each Tumor has a variable lifespan (the minimum is 14 seconds).
Visitor:
An undead hostile mob that can spawn near beds or in Radiant Shrublands, Mind Forests, and Mind Jungles. It has 40 HP, can shoot radiant projectiles, spread dead nexus, and spawns Wreckeds.
Drops: up to 4 Bone Shards, 5 Nexus Skins, and 8 Leather.
Wrecked:
An undead hostile mob that spawns near Dead Nexus blocks or is summoned by Visitors actively attacking a player. It has 30 HP and quickly chases after the player.
Drops: up to 4 Nexus Skins.
Infector:
An undead hostile mob that spawns near Dead Nexus blocks. It has 30 HP, can spread dead nexus, and has increased melee range thanks to its large claw. It allows Dead Nexus to grow Red Cacti, Nexus Roots, Mind Saplings, and Nexus Meat within a 100‑block radius. Infectors can spawn Nexus Tumors, allowing the infection to spread even further.
Drops: up to 4 Nexus Skins and 4 Bone Shards.
Hog:
A hostile undead version of a Pig that can infect Pigs, Cows, Sheep, and Chickens. It is created when an Infector, Wrecked, Visitor, or another infected mob attacks a Pig.
Drops: up to 4 Infected Meat
Ramus:
A hostile undead version of a Sheep that can infect Pigs, Cows, Sheep, and Chickens. It has 32 HP, walks slowly and is immune to knockback, working as a tanky enemy. It is created when an Infector, Wrecked, Visitor, or another infected mob attacks a Sheep.
Drops: up to 4 Infected Meat and a White Wool
Pesky:
A hostile undead version of a Chicken that can infect Pigs, Cows, Sheep, and other Chickens. It has 20 HP, can jump very high, and has permanent Slow Falling. It is created when an Infector, Wrecked, Visitor, or another infected mob attacks a Chicken.
Drops: up to 5 Feathers, 2 Rotten Flesh, and 1 Nexus Egg.
Behemoth:
A hostile undead version of a Cow that can infect Pigs, Cows, Sheep, and Chickens. It has 20 HP and has increased attack knockback. It is created when an Infector, Wrecked, Visitor, or another infected mob attacks a Cow.
Drops: up to 4 Infected Meat and up to 2 Leather
Wolferus:
A hostile undead version of a Wolf. It is created when an infected mob attacks a Wolf. Does leap attacks, has 22 HP and deals 6 melee damage.
Drops: up to 4 Nexus Skins and 2 Bones
Killer Bunny:
A hostile undead version of a Rabbit. It behaves similarly to the vanilla mob but jumps less frequently. This variant has 3 HP and deals 8 melee damage.
Drops: up to 3 Nexus Skins, 1 Infected Meat, 1 Rabbit Hide, and 1 Rabbit's Foot
Charger Beast:
A hostile undead version of a Horse/Donkey. It is created when an infected mob attacks a Horse/Donkey. Can step up 1 block without jumping just like regular Horses.
Drops: up to 4 Nexus Skins and up to 4 Leather
Wounded:
An infected version of a Zombie/Husk. It is created when an infected mob attacks a Zombie/Husk. Can also spawn on the surface during the night and moves faster than standard Zombies.
Drops: up to 3 Rotten Flesh, 3 Nexus Skins, 2 Bone Shards, and 1 Iron Ingot
Inflated:
A hostile undead version of a Villager/Wandering Trader. It is created when an infected mob attacks a Villager/Wandering Trader. When its HP drops below 30, its head explodes and spawns deadly Nexus Gas for 2 seconds. Has 40 HP and deals 6 melee damage with head/ 4 without head.
Drops: up to 5 Emeralds
Blaster:
A hostile undead version of a Pillager. It is equipped with a Blaster Crossbow, which it uses to shoot at the target at a fast pace.
Drops: up to 4 Bone Shards, 13 Bone Thorns, and can even drop the Blaster Crossbow
Murk:
A flying hostile mob hatched from a Nexus Egg. It has 80 HP, shoots smoke bombs that inflict Weakness, and can spawn lightning clouds around itself.
Drops: up to 4 Murk Nebulas, obtained from the Nebula Cloud that appears after the Murk dies.
Acid Stalker:
A hostile undead mob that disguises itself among Acid Piles. It has 30 HP and shoots radiant projectiles that leave behind large acid effect clouds.
Drops: up to 4 Acid Piles and 3 Radiant Fangs.
Heartlen:
A hostile mob found only in Nexus Hives. It can break most blocks, excluding Nericin, Dreaded Bone Blocks, Nexus Cores, Hive Blobs, and Nexium Cores. Heartlens can be slowed down for 10 seconds by breaking a glowing Hive Blob block inside Nexus Hives.
Drops: up to 2 Heartlen Pieces
Brainlet:
A hostile mob that can spawn when breaking Nexium Cores, or be spawned by Torment Roots. Spawns lethal Nexus Gas shortly after dying, which lasts for 2 seconds.
Drops: up to 3 Nexus Skins
Tangler:
A Tangler is created by placing a Dreaded Bone Block and then placing a Carved or Radiant Entangled Melon on top. It is a neutral mob with 70 HP that attacks hostile mobs.
Giving it an Entangled Stick increases its HP to 90 and allows it to summon mossy barriers at half health, granting Resistance. Tanglers follow players holding an Entangled Stick.
Drops: up to 8 Bone Shards and 1 Carved Entangled Melon.
Soul Moth:
A flying hostile arthropod that spawns in Overgrown Castles. It has 40 HP, shoots fire that creates soul fire and soul soil, and takes damage when the player breaks a Nexus Blob nearby.
Drops: up to 2 Weathered Silk and 3 Fire Charges.
Radiant Sentry:
A stationary hostile mob found in Overgrown Castles. It has 50 HP and shoots radiant charges, similar to Acid Stalkers.
Drops: up to 2 Radiant Ash and 1 Diamond.
Torment Root:
A hostile mini‑boss that can be summoned by inserting a Nexium Heart into the Heart of a Nexus Hive. Can be stunned for 3 seconds by breaking a Hive Blob inside Nexus Hives; while stunned it cannot attack the Player in melee range.
Uses Nexus Jaws to damage the Player; these are spawned above the Player and emit Nexus Saliva, which deals 3 damage when stood under.
Can spawn up to 2 Brainlets and up to 4 Torment Tentacles, which deal 6 melee damage and are stationary like the Torment Root.
Drops: up to 6 Nexium and a Nexium Tentacle
Deceiver:
A hostile boss mob residing in the basement of the Overgrown Castle. It disguises itself as a Villager, but when a player approaches, it rushes forward, revealing its true form.
It has 200 HP, and the player must damage it using Nexus Blobs, which deal 25 damage when broken and inflict Slowness and Weakness for 2 seconds. Destroyed blobs deactivate and stop emitting light for 45 seconds.
The Deceiver can:
- Apply the Captured effect to nearby players, spawning a Bone Trap that slows and poisons them
- Spawn blinding gas
- Transform into its crawler form, becoming very fast but dealing less damage
- Teleport
- Despawn common hostile mobs within a 40‑block radius (Zombies, Skeletons, Creepers, etc.)
It becomes visually more damaged as its HP decreases.
Drops: 1 Nexus Amulet.
Humanoid Nexadar:
An undead boss mob that can spawn on the surface near the infection if a Heartlen is active within a 100×100×100 area and no Nexium Mark exists within a 60×60×60 area.
Can be hurt using a Nexium Tentacle; if hurt with normal weapons (such as swords), it regenerates HP.
It transforms into the Nexadar upon defeat, and it despawns unlike other boss mobs in the mod.
- Can summon clones that can also be hurt using a Nexium Tentacle. Clones can be identified because they can be slowed by the Nexus Amulet and they hold a slightly different
- Has 80 HP, deals 8 melee damage and shoot radiant projectiles
Nexadar:
A large undead boss mob that appears after defeating the Humanoid Nexadar. Has 350 HP and deals 10 melee damage.
Can summon 2 Visitors at once - this ability has a 45 second cooldown
Can summon 2 Nexrods at once - Nexrods are flying hostile mobs that shoot poisonous projectiles and die after 18 seconds
Uses Nexus Jaws to damage the Player similarly to the Torment Root; these are spawned above the Player and emit Nexus Saliva, which deals 3 damage when stood under
Can quickly dash toward the player
Occasionally becomes enraged and spawns Nexus Dust. After this, it gains a speed boost; if it reaches the player they get the Doomed effect
While the Doomed effect is active the Player must keep moving - Nexadar Spikes will spawn at the player’s position after a short delay and these deal 3 damage
After it dies it will deactivate the Nexus Infection, a Treasure Nexus will appear and the Nexadar drops 3400 XP, a message will appear on the chat that says: "The infection has been shut down for good, but its remains may still haunt the world."
The Treasure Nexus drops a Nexus Trophy, up to 12 Withered Tissue, up to 34 Nexus Skin, and up to 2 Nexus Amulet Upgrades
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.20.1, 1.21.1, 1.19.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as diognitemod_3.0_alpha2.jar — drop this file into the mods folder
- Download size: 405 KB
- Download link checked 15 Oct 2026 — working
These come from our own check of the pack file, not from the source page.