One Block Mod (1.21.11, 1.20.4) – Survival Challenge Progressive

One Block Mod (1.21.11, 1.20.4) is a Minecraft mod that transforms the Minecraft experience into an upgraded form of OneBlock survival/skyblock. You start on a small island with only one special block, and when you break that block, it regenerates with new materials each time, allowing you to evolve your world from resource-first to late-game.

Features:

• When you create a One Block world:
  • You will spawn on a small island (e.g., Overworld has grass & dirt, Nether has netherrack, End has endstone).
  • In the center is a regeneration block (OneBlock). This is the block you will destroy to get resources back.
  • In multiplayer, each player can spawn on their own island 1000 blocks apart using an optional datapack.
• One Block features a progression system based on “biomes”:
  • 36 Overworld biomes.
  • 5 Nether biomes.
  • 5 End biomes.
  • As you evolve, One Block will generate blocks in different “biome stages”.
• When you go to the Nether or End, you will unlock additional blocks and corresponding items:
  • Nether unlocks: basalt, blackstone, valuable gifts such as warped/crimson woods, fungi…
  • End unlocks: purpur, chorus plants, end rods, shulkers…
  • After about ~10,000 breaks, the mod may also allow the end portal frame to drop by default.
• The blocks that appear when you break a OneBlock will change depending on the number of times you break it:
  • Early stages prioritize useful resources (wood, stone, ore).
  • Later stages prioritize random variety.
• The OneBlock mod will generate random events each time a block is broken, including:
  • Item Drops: items drop near you or in random chests
  • Waves mobs: waves of monsters with increasing difficulty as you progress
  • Friendly mobs: peaceful animals, villagers, wandering traders, depending on conditions
  • These events are scaled according to difficulty and progression, not just simply spawning mobs.
• Monster Waves:
  • Mobs spawn according to difficulty tier (zombies/spiders → skeletons/creepers → endermen/witches/blazes…).
  • Mobs spawn based on light according to vanilla logic (e.g., zombies burn daylight, spiders don’t).
  • Nether/End mobs will join when you unlock them, respectively.
• OneBlock not only spawns monsters but also normal mobs when conditions are met:
  • Farm animals (cows, pigs, sheep…).
  • Neutrals (wolves, llamas, bees…).
  • Ambient (parrots, cats, turtles…).
  • Aquatic if enough water is created (a 5×5 pool must be placed).
  • Traders with llamas.
• Use /oneblock admin for the admin panel. The settings are:
  • Settings for waves (enable/disable, frequency, max size, difficulty tiers).
  • Drops (item drops, friendly mobs spawn).
  • Item settings (number of drops, lava bucket chance).
  • End portal frame settings.
  • Progression cap.
  • Wave countdown tiers.
  • Visual/particle/sound effects.
  • Use click/shift-click to increase or decrease setup values ​​directly in the UI panel.
• OneBlock adds several special crafting recipes to aid survival in the void:
  • Ice compression → Water bucket: 4 ice + 1 bucket → water bucket
  • Magma compression → Lava bucket: 4 magma + 1 bucket → lava bucket
  • This allows you to create renewable water and lava using OneBlock resources instead of having to find them naturally.

Screenshots:

Crafting Recipes:

Recommend that you should install Just Enough Items (for mods using Forge) or Roughly Enough Items (for mods using Fabric) to view the full recipes included in this mod.

Requires:

Fabric API

How to install:

Click the following link to view details: How to Install Mods for Minecraft Java Edition on PC: A Beginner Guide

One Block Mod (1.21.11, 1.20.4) Download Links

For Minecraft 1.20.6, 1.20.4

Fabric version: Download from Server 1 – Download from Server 2

For Minecraft 1.21.10

Fabric version: Download from Server 1 – Download from Server 2

For Minecraft 1.21.11

Fabric version: Download from Server 1 – Download from Server 2