Open source under the MIT license — read every line before you install it.
Is it safe?
· yes — and you don't have to take our word for it ·Open source — audit it yourself
Every line is on GitHub under the MIT license. Read it, build it yourself, or have someone you trust check it.
Render & UX only
It never sends gameplay actions for you. It draws HUDs and screens; the server stays fully authoritative.
Locked to Ancients
An allowlist gates it to the Ancients network — it does nothing on any other server.
Nothing is gated behind it
The whole game — including this skill tree — is fully playable without it. The mod is purely a nicer experience.
It's a Fabric client mod for Minecraft 1.21.11, and runs happily alongside performance mods like Sodium and Lithium. It needs the Fabric Loader + Fabric API — it is not a Lunar Client mod and won't load inside Lunar. If you already play on Fabric, you're set.
Install
· about two minutes ·Install Fabric
Get the Fabric Loader for Minecraft 1.21.11 and drop Fabric API into your mods folder.
Download the jar
Grab the latest prisonsmod-*.jar above.
Drop it in
Move the jar into your mods folder next to Fabric API.
Launch & join
Start Minecraft on the Fabric profile and join ancients.gg.
What it adds
· all visual · all optional ·In-game skill tree
Open the full Tartarus tree from the Oracle and allocate without leaving Minecraft — the same tree as the website.
Floating combat numbers
Damage and XP pop above enemies so you can read your hits at a glance.
Gang ping markers
Ping a spot for your gang; everyone sees a clean world marker.
Mine break prediction
Client-side prediction makes mining feel instant and crisp.
Rift & event HUDs
Clean overlays for the Rift, cascades, and live events.
Smarter tooltips
Collapsible, scrollable tooltips for those huge modded items.
Everything the mod shows in-game, you can do from the website. Allocate your skill tree in your browser — the game is always fully playable without installing anything.