Altar Mod
by woook111
Altar Mod, a NeoForge economy mod for 1.21.8, lets players sacrifice items on a placed Altar block to gain points and spend those points to duplicate stacks of items.
What it does
Players place an item on the Altar block to convert it into points. The points then pay for duplicating items from the sacrifice system, and a single spend can copy an entire stack at once. The custom economy is described by the author as experimental, so its balance may change between builds.
Points fade after 40 minutes of real-world time, and each new sacrifice resets that timer. Vanilla items use a default standard point value, while modded gear and unknown items carry a higher default cost, which keeps endgame equipment from being cloned cheaply. The mod is published for NeoForge only and runs on client and server, so the server and every player need it.
The modification also introduces custom gear entities, extra blocks, bosses and high-tier equipment that add survival challenges beyond the Altar itself. The author asks for feedback on balance suggestions.
Key features
Altar sacrifice
A placed Altar block accepts items and converts them into points that feed the duplication system.
Stack duplication
Spent points copy entire item stacks instantly, using the sacrifice system as the source of value.
Fading points
Points expire after 40 minutes of real-world time, and each new sacrifice resets the timer.
Priced modded gear
Modded items and unknown items default to a high point cost, which limits cloning of endgame equipment.
Bosses and high-tier gear
Additional blocks, bosses and high-tier equipment add survival content alongside the economy.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players who want an economy system built around an item-sacrifice altar, and server owners who run NeoForge 1.21.8 and are willing to test an experimental economy.
How it compares
The Void Cult is a NeoForge mod for 1.21.1 under the MIT License, open source and set to client and server, so it covers a different game version. Ant (No Ants Included) is server-side only, not open source, and published for 1.21.1 under All rights reserved, so players join without installing it. SG-Economy API is NeoForge for 1.21.1 under a custom license and needs client and server, offering an economy API rather than an altar.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Altar Mod | NeoForge | 1.21.8 | Client and server | 2026-09-27 |
| The Void Cult | NeoForge | 1.21.1 | Client and server | 2026-06-03 |
| Ant (No Ants Included) | NeoForge | 1.21.1 | Server-side only | 2026-08-29 |
| SG-Economy API | NeoForge | 1.21.1 | Client and server | 2026-05-31 |
Questions
Which NeoForge version does Altar Mod support?
Does the server need Altar Mod?
How long do points last?
Can modded gear be cloned cheaply?
In the catalog
Altar Mod is one of 2,072 Economy mods on ModsFinder, and one of 917 Economy mods for NeoForge. 17,695 mods support Minecraft 1.21.8.
Similar mods
What the author says
Welcome to Altar Mod for NeoForge 1.21.8. This modification introduces a unique Altar block alongside custom gear, entities, and new challenges for your survival world. ⚠️ ATTENTION: The economic balance of the Altar is currently EXPERIMENTAL. Feedback and balance suggestions are highly appreciated.
Official listing
- Modrinth page
- modrinth.com/mod/altar-mod
- Owner
- woook111
- Published
- 2026-08-02
- Updated on Modrinth
- 2026-09-27
- Facts verified
- 2026-10-15