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AethersteelMinecraft mod for 1.21.4

Better than netherite

client and servernewest supported release 1.21.4EquipmentDecorationWorldgen
Latest version
5.6
Minecraft
1.19.2 to 1.21.4
Java
Java 21+
Loaders
NeoForge, Forge
Licence
LicenseRef-All-Rights-Reserved
Downloads
58.1k
Updated
20 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Aethersteel servers

One click and Aethersteel is installed with the right loader, on hardware built for it.

  • 1.21.4
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Aethersteel declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.4NeoForge, Forge21+declared3 Dec 2024
1.21.3NeoForge, Forge21+declared23 Oct 2024
1.21.2Forge, NeoForge21+declared22 Oct 2024
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.20.1NeoForge, Forge17+declared12 Jun 2023
1.19.4NeoForge, Forge17+declared14 Mar 2023
1.19.2Forge, NeoForge17+declared5 Aug 2022

Download

From Aethersteel’s own host. Nothing is re-hosted here.

Most recently published release

5.6release10 Mar 2025

Aethersteel-v5.6-1.21.4.jar · 1.9 MB · for 1.21.4 · NeoForge

Download this release
42664efdfa90…
Older versions23
  • 5.51 Dec 20241.21.11.9 MB871 downloads6b17a68c89ab…Get
  • 5.44 Feb 20241.20.11.9 MB245 downloads29ea7c51117f…Get
  • 5.330 Jan 20241.20.11.9 MB97 downloads28096ce3ea2d…Get
  • 5.220 Jan 20241.20.11.9 MB127 downloads2f98f5ff4f5f…Get
  • 5.15 Nov 20231.20.11.9 MB260 downloads602c633b267c…Get
  • 5.013 Oct 20231.20.11.9 MB110 downloadse6f3bc0d277b…Get
  • 4.915 Sept 20231.20.11.6 MB85 downloads534a6de4f8b6…Get
  • 4.82 Sept 20231.20.11.6 MB49 downloadscf9b5aa7abba…Get
  • 4.728 Aug 20231.20.11.6 MB47 downloads00d99e8c383a…Get
  • 4.621 Aug 20231.20.11.8 MB52 downloads0d84da6adf63…Get
  • 4.515 Aug 20231.20.11.8 MB53 downloads5554ad43f715…Get
  • 4.414 Aug 20231.19.41.8 MB49 downloads720b5191d31d…Get
  • 4.37 Aug 20231.19.41.8 MB43 downloadsa3e7ec30330c…Get
  • 4.215 Jul 20231.19.40.5 MB72 downloads60ba7e7cf27c…Get
  • 4.18 Jul 20231.19.40.4 MB32 downloads7ad6bc58ed72…Get
  • 4.02 Jul 20231.19.40.4 MB34 downloads1cead8b6b5ae…Get
  • 3.99 Jun 20231.19.40.4 MB45 downloads71aaf8858c7d…Get
  • 3.89 Jun 20231.19.40.4 MB34 downloads5a55fe01fc46…Get
  • 3.79 Jun 20231.19.40.4 MB27 downloads733725a7bc97…Get
  • 3.69 Jun 20231.19.40.4 MB36 downloadsa27e126dc1a4…Get
  • 3.59 Jun 20231.19.40.4 MB34 downloadse7a5fc8646bf…Get
  • 3.49 Jun 20231.19.40.4 MB31 downloads12635a632800…Get
  • 3.39 Jun 20231.19.40.4 MB45 downloadsf89cce325159…Get

Frequently asked

Does Aethersteel work on Minecraft 1.21.4?

Yes. 1.21.4 is the newest Minecraft version Aethersteel declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Aethersteel support?

Everything the author has declared, from 1.19.2 up to 1.21.4. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Aethersteel on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Aethersteel support?

NeoForge, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Aethersteel?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is Aethersteel under?

LicenseRef-All-Rights-Reserved, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Aethersteel?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Aethersteel safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftArchitectury APIAn intermediary api aimed to ease developing multiplatform mods.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)Collective🎓 Collective is a shared library with common code for all of Serilum's mods.AttributeFixRemoves arbitrary limits on Minecraft's attribute system.sparkspark is a performance profiler for Minecraft clients, servers and proxies.

Details from Modrinth, where the author last updated it on 10 Mar 2025. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .