Quick answer: Trial Chambers, added in 1.21, generate underground in the deepslate layer. This finder searches for seeds with a Trial Chamber within ~512 blocks of spawn; verified seeds for Java 26.2, Large Biomes and Bedrock 1.26.30 are listed below.
This search at a glance
| Criteria | One Trial Chamber within ~512 blocks of spawn |
|---|---|
| Editions | Java, Large Biomes and Bedrock |
| Versions | Java 26.2 · Bedrock 1.26.30 |
| Verified seeds ready | 12 per edition (listed above), each with a measured accuracy % |
How do I find a trial chamber seed near spawn?
This page opens the finder pre-set to one Trial Chamber within ~512 blocks of spawn. The pre-found seeds already match — copy one or search for more.
What is the point of a trial chamber?
Trial Chambers have Trial Spawners and Vaults with rewards including the Heavy Core needed to craft the Mace, plus Breeze and Bogged mobs. A near-spawn chamber makes early Mace runs easy.
Are trial chambers on Bedrock too?
Yes, since Bedrock 1.21. Placement differs from Java, so each seed here is re-verified for Java, Large Biomes and Bedrock. Select your edition to see valid seeds.
Which versions support this?
Trial Chambers exist on Java 1.21+ and Bedrock 1.21+. These seeds are verified against the current Java 26.2 and Bedrock 1.26.30 worldgen.
Seed Finder vs. a biome finder
| Seed Finder (this tool) | Biome finder / seed map | |
|---|---|---|
| What it does | Discovers a new seed that matches your criteria | Renders a seed you already have |
| You start with | Criteria — structures and biomes near spawn | A seed number you already know |
| You get | A list of matching seeds, each with a map | A map of that one seed |
How this Seed Finder compares
| Tool | Java | Bedrock | Current version | Map per result | Accuracy % | Localized |
|---|---|---|---|---|---|---|
| Minecraft Search | Yes | Yes | 26.2 / 1.26.30 | Yes | Yes | 28 languages |
| MC Seed View | Yes | No | Yes | Yes | No | English only |
| mcseedmap.net | Yes | Yes | Yes | Yes | No | Partial |
| mcseeder | Yes | No | caps at 1.21 | Limited | No | English only |
| seedmap.app | Yes | Partial | Yes | Yes | No | No |
| Chunkbase | No general criteria seed finder — only a slime-chunk finder | |||||
