One Block Reborn
by Dnydd
One Block Reborn is a Forge and NeoForge world generation mod that brings the classic OneBlock skyblock play to a native mod instead of a datapack.
What it does
A single Origin Block floats in open air, and a player mines it to start the run. Each mined block gives the next one, and the count of mined blocks grows as the player climbs through nine built-in progression phases. Phases bring new block pools, passive mob spawns and trader offers, and the mod handles the end portal milestone and mob-related achievements through its own advancement tree rather than external scripts.
The mod is built to be tested alongside other void-world and skyblock mods. Pack developers can edit the phases with JSON files in a datapack, which requires Java and operator level 2 on the server, and can set weighted entries for blocks, mobs and chests with count ranges, NBT conditions, dimension and biome filters, timed or weather conditions, and exact-count drops. Installation needs Void One Block as a required dependency. One Block Reborn runs on client and server and is published for Forge and NeoForge across 17 release versions, 1.20.1 – 1.21.11, under All rights reserved.
Key features
Nine progression phases
A built-in timeline of nine stages, with a bossbar that shows how close the player is to the next stage.
Visiting trader system
Mobs are spawned and tracked through a crate, and visiting traders offer custom pools that a pack can override per stage.
Origin Block placement
The Origin Block places against the face of the block a player clicks, so it can float in open air and cannot be placed by right-clicking nothing.
Customizable entry pools
Weighted block, mob and chest entries accept mob count ranges, NBT and dimension conditions, and stage actions, with a world border that can change per stage.
Compatibility
Latest build for each game version and loader.
1.21.x11 of 11 versions with builds
1.20.x6 of 6 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
OneBlock CraftBound: Classic is a Forge and NeoForge OneBlock mod for 1.19.2 – 1.21.1, with the same client and server environment and an All rights reserved license. Ben's Oneblocks is Forge only, for 1.20.1, under the Creative Commons Attribution Share Alike 4.0 license, and it is not open source. More World Presets is open source under the GNU General Public License v3.0 only, runs on Fabric and NeoForge, and covers 1.20.1 – 26.1.2.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| One Block Reborn | Forge and NeoForge | 1.20.1 – 1.21.11 | Client and server | 2026-07-27 |
| OneBlock CraftBound: Classic | Forge and NeoForge | 1.19.2 – 1.21.1 | Client and server | 2026-09-13 |
| Ben's Oneblocks | Forge | 1.20.1 | Client and server | 2025-08-19 |
| More World Presets | Fabric and NeoForge | 1.20.1 – 26.1.2 | Client and server | 2026-09-20 |
Questions
Does One Block Reborn need Void One Block?
Does the server need One Block Reborn?
Can the phases be changed without editing Java?
In the catalog
One Block Reborn is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 19,862 mods support Minecraft 1.21.11.
More from Dnydd
Similar mods
What the author says
OneBlock Reborn brings the classic OneBlock skyblock experience to Forge 1.20.1 as a native mod, instead of a datapack. Place your Origin Block, start mining, and watch a full progression system unfold entirely, features, phases, mobs, traders, and achievements included, with none of it relying on external datapack…
Official listing
- Modrinth page
- modrinth.com/mod/one-block-reborn.
- Owner
- Dnydd
- Published
- 2026-07-13
- Updated on Modrinth
- 2026-07-27
- Facts verified
- 2026-10-15