ER Core
ER Core is a Forge utility mod for Minecraft 1.12.2 that adds a stamina system, teleport requests and a set of supporting features for modpacks.
What it does
Players gain an endurance value that drops during strenuous activity such as sprinting and jumping, and when it is exhausted they take damage, which can cause death. Commands expose the value so other mods and scripts can read it, add to it or remove it. Teleport requests between players are included, with tab completion, cross-dimension travel, notification sounds and a timeout.
Many features are off until enabled in the configuration file, and the teleport commands need permissions before players can use them. Optional integrations with CraftTweaker, FirstAid, Lootr and Tinkers' Construct add their own behaviour when those mods are present. The mod is open source under the Apache License 2.0 and runs on client and server, so both the server and every player need it. Files are published for Forge 1.12.2 only, with 1.3.0 as the latest file.
Key features
Endurance system
Endurance drops during sprinting, jumping and other exertion, and exhaustion can hurt the player.
Teleport requests
Players send requests to each other, with tab completion, cross-dimension travel and a timeout.
Loot chest replacement
Naturally generated player chests can be swapped for Lootr chests that regenerate.
Food tooltips
Tooltips show food points and saturation as values, not only as icons.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Optional 4
Use cases
Survival and adventure maps
The endurance system adds a resource to manage on maps built around exploration and combat.
Modpack building
Modpack authors can switch features on or off in the configuration file to shape the pack.
Who it’s for: Server owners and modpack authors who want a stamina mechanic and teleport requests on Forge 1.12.2, and scripters who use CraftTweaker to read or change endurance.
How it compares
Exhausted is a Forge stamina mod for 1.20.1 – 1.20.6, open source under the GNU Lesser General Public License v3.0 only, and it is also client and server. First Stamina is a Forge stamina mod for 1.19.2 under All rights reserved, and DollMan'B Stamina covers 1.20.1 under the same license. ER Core targets the older 1.12.2 version, which none of these cover.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| ER Core | Forge | 1.12.2 | Client and server | 2026-06-19 |
| Exhausted | Forge | 1.20.1 – 1.20.6 | Client and server | 2026-06-23 |
| First Stamina | Forge | 1.19.2 | Client and server | 2025-09-19 |
| DollMan'B Stamina | Forge | 1.20.1 | Client and server | 2025-07-21 |
Questions
Does ER Core need Forge?
Does the server need ER Core?
Are any other mods required?
In the catalog
ER Core is one of 19,031 Adventure mods on ModsFinder, and one of 10,478 Adventure mods for Forge. 2,920 mods support Minecraft 1.12.2.
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Official listing
- Modrinth page
- modrinth.com/mod/er-core
- Owner
- Origins_Eternity
- Published
- 2026-06-19
- Updated on Modrinth
- 2026-06-19
- Facts verified
- 2026-10-15