Create: Trial & Error
by koltino
Trial Error lets players automate the Trial Chambers of Minecraft 1.21 through production lines built with Create machines and new cast-based key recipes.
What it does
The mod covers the Trial Chamber vaults, which in the base game open only when a player stands within a certain distance. Here, Deployers can open vaults remotely, so a vault can run from a production line with no player nearby. A Blank Slate item, called Tabula Rasa here, lets a vault be attempted again, and a single application makes a vault openable once more. Vaults obtained from Ominous Vaults can be duplicated with Mechanical Crafters.
Ominous Trial Keys can be replicated with key casts, though each cast carries a steep risk of failing, and a mix of Tuff Copper and Veridium supports automated recipes for keys. Renewable copper is one result of the Tuff and Veridium automation. The mod also reworks the look of Trial Chambers, swapping their palette for Create decorative blocks such as andesite grates, bulbs and trapdoors. Vault loot gains Create items like zinc and andesite alloy.
Trial Error requires Create and Create: Oxidized. It is published for NeoForge only, under the MIT License, and its code is public. Players and servers both need it, because it works on the client and the server together. Files cover 1.21.1 – 1.21.7, and the latest file is 1.3.2 for 1.21.1, released on 2025-12-21.
Key features
Remote vault automation
Deployers open Trial Chamber vaults without a player nearby, so vaults can sit in a full production line.
Key casts
Ominous Trial Keys and regular keys can be replicated through casts, with a high failure chance after each cast.
Vault reattempts
A Tabula Rasa item lets a vault be reattempted, and a single use makes the vault openable again.
Create-styled Trial Chambers
Trial Chamber palettes use andesite grates, bulbs, trapdoors and other Create decorative blocks.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
How it compares
No More Trials for NeoForge is server-side only, MIT licensed and not open source, and supports 1.21.1 – 26.1.2, so players can join without installing it. Trial Key Recipe covers Fabric, Forge, NeoForge and Quilt 1.21 – 26.3, with the server required and clients optional, and its license is All rights reserved. Create:Tuff (port) and Create Automated both target 1.21.1 with the client and server environment, but Create Automated is open source under the MIT License while Create:Tuff is not.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Create: Trial & Error | NeoForge | 1.21.1 – 1.21.7 | Client and server | 2025-12-21 |
| No More Trials (NeoForge) | NeoForge | 1.21.1 – 26.1.2 | Server-side only | 2026-04-30 |
| Trial Key Recipe | Fabric, Forge, NeoForge and Quilt | 1.21 – 26.3 | Server required, client optional | 2026-09-19 |
| Create:Tuff (port) | NeoForge | 1.21.1 | Client and server | 2026-05-14 |
| Create Automated | NeoForge | 1.21.1 | Client and server | 2026-10-02 |
Questions
Which loader does Trial Error need?
Does Trial Error need Create installed?
Does Trial Error have to be installed on the server?
In the catalog
Create: Trial & Error is one of 8,499 Technology mods on ModsFinder, and one of 3,557 Technology mods for NeoForge. 13,697 mods support Minecraft 1.21.7.
More from koltino
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What the author says
While Create has been updated to 1.21 for some time, there hasn't been much interaction between 1.21's new features and Create... until now! Create: Trial & Error allows for full automation of the Trial Chamber's Vaults through various features. Key Casts: Both regular Trial and Ominous Keys can now be replicated by…
Official listing
- Modrinth page
- modrinth.com/mod/create-trial-and-error
- Owner
- koltino
- Published
- 2025-07-03
- Updated on Modrinth
- 2025-12-21
- Facts verified
- 2026-10-15