
Archaion
Java mod listed for Minecraft 26.x. Downloads from the MC Java Mods app on Android.
A forgotten tale of the Ancients - their final stand, and their inevitable fall. Venture into the Ancient Keep, challenge its twisted Trial Spawners, and…
⬇ Download on Modrinth



Archaion
"The First came before us. This one came after. Our Last."
Requires AAAParticles
Welcome to Archaion - a mod that tells the story of the mysterious ancients' last stand against an unknown threat and their eventual downfall. Discover the remnants that were left behind after the greatest crisis in the history of this world.

The Ancient Keep

The final fort of the Ancients to fight off the disaster - a complex multi-room structure called the Ancient Keep that operates similarly to a Trial Chamber.
Throughout your journey within this keep, you are bound to encounter harsh challenges and great adversities. You will also be able to unlock and loot various treasures and new items!
The Deepslate Trials

The Ancient Keep holds a challenge where you must fight multitudes of new custom enemies, each with a quirk of their own.
Upon clearing enough of them, you can obtain the Echo Key, used to open the Deepslate Vault - where you can obtain powerful items such as food, materials, and enchantments.
The Last of Deepslate

When obtaining enough Echo Charges from the vaults, you can wake up the slumbering machine hidden inside the Keep - a Last of Deepslate.
Fight the mech upon waking it up, with multiple complex systems backing its every move. Slay it to obtain a powerful template used to make a very strong weapon!

Bossfight Guide
Locating the Ancient Keep
- You can search for the Ancient Keep by using the Keep Map found in Ancient City chests.
Bossfight Recommendations
- Fully Enchanted Diamond Gear (Preferably with Protection IV; prepare for armor durability breaking).
- Breeze Charge (Heavily recommended for Phase II and above).
- Shield (Enchant with Unbreaking or prepare backups).
- Bow / Any Other Ranged Weapon.
Bossfight Notes
- The boss is very much stronger in Hard difficulty compared to Medium.
- Be very careful when using the Mace. It has a counterattack that deals insane damage when timed poorly.
- You will die multiple times!
Frequently Asked Questions
Is there a 1.20.1 backport?
There are no current plans to port the mod back to 1.20.1, as there is no proper Trial Chamber + Mace backport mod just yet. However, if there is one, we WILL definitely backport this mod.
Is there a Fabric port?
There are no current plans to port this mod to Fabric.
Are unofficial ports allowed?
You CANNOT make unofficial port uploads of this mod. However, if you can do these ports, you may contact RatRod or AquTheSeal and we can discuss it.
Credits

Primal Xenolith - Last of Deepslate Boss Theme (Phase I, II, and III)
BoxKnight - Some of the Ancient Keep rooms
LaDiamond - Some of the Last of Deepslate Animations
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 26.1.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as archaion-26.1.2-1.4.3.jar — drop this file into the mods folder
- Download size: 6.9 MB
- Download link checked 10 Nov 2026 — working
These come from our own check of the pack file, not from the source page.