E21S's Copper upgrade
by E21S
E21S's Copper upgrade lets players upgrade tools with copper, turning the metal into a more sought-after resource for crafting.
What it does
Tools are improved with copper through a set of steps. A player first has to find a structure called the blocked passage, dig up a treasure chest that holds a copper rune, and melt copper ingots in a furnace to obtain molten copper. The rune and the molten copper are then used at a blacksmith's table to upgrade tools.
The mod is for players who want a reason to gather and process copper in survival play. Because the upgrade needs several copper-based items, copper becomes more valuable in the course of a run. Installation needs Forge or NeoForge, and the environment is client and server, so the server and every player need the mod.
Files are published for Forge and NeoForge, with game versions 1.20.1 – 1.21.8. The latest Forge file is 2.1 for 1.20.1, published on 2026-04-09, and the latest NeoForge file is 1.1.3 for 1.21.8, published on 2025-10-30. The mod is released under All rights reserved, so it is not open source.
Key features
Copper tool upgrades
Tools are upgraded with copper, which gives copper a larger role in equipment progression.
Blocked passage structure
A structure called the blocked passage is where the copper rune chest is found, so exploration is part of the upgrade path.
Molten copper smelting
Copper ingots are melted in a furnace to produce molten copper, which the upgrade recipe requires.
Blacksmith's table upgrades
The copper rune and molten copper are combined at a blacksmith's table to upgrade a tool.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Questions
Which loaders does the copper upgrade support?
Does the server need the mod?
Where is the copper rune found?
In the catalog
E21S's Copper upgrade is one of 17,631 Equipment mods on ModsFinder, and one of 9,216 Equipment mods for Forge. 17,695 mods support Minecraft 1.21.8.
Similar mods
What the author says
The mod allows you to upgrade your tools with copper, making copper a more sought after resource. To upgrade a tool, you need to find a structure called a blocked passage, dig it up and find a treasure chest containing a copper rune. Also, to upgrade, you need to melt a copper ingot in a furnace to get molten copper…
Official listing
- Modrinth page
- modrinth.com/mod/e21s-copper-upgrade
- Owner
- E21S
- Published
- 2025-05-23
- Updated on Modrinth
- 2026-04-09
- Facts verified
- 2026-10-15