Heavy Expansion

This mod expands on the heavy core block from the 1.21 tricky trials update

90 Downloads

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About this Mod

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This mod expands on the heavy core block from the 1.21 tricky trials update and adds a new armor
set a new sword and new items paired with it to start you will need a heavy core and put it in a blast furnace to smelt
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once its smelted you will get a molten core
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with said molten core when put into a smithing table with these items
you will ubtain molten items to tuen into the new armor and sword
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And too craft the item casts. You craft them like so with there corresponding iron tool

And once you have gotten the molten tool if you right click them on a cauldron with water in it you will get your new item

Available Versions

Heavy Expansion 1.0.0release

MC 1.21.4, 1.21.5neoforge

April 3, 2025

How to Install Heavy Expansion on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.5).

Install Mod

Open the mod browser in the dashboard and search for "Heavy Expansion". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.5, 1.21.4

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Heavy Expansion server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.5). You can switch loaders with one click in the panel.

Is Heavy Expansion compatible with neoforge?

Heavy Expansion officially supports neoforge for Minecraft 1.21.5, 1.21.4. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Heavy Expansion – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Heavy Expansion consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.